Am I rudeless for cutting out a narc friend?

First of all, English isn't my native language so apologies if this is hard to follow at some points. Also cause this is gonna be a long post but is my first time opening up on this and is a lot of bottled feelings. Some background:
I've met this girl for 18 years, since we were 15. She was always a little extra and too much but instead of maturing she got even worse overtime. I've always tried to be patient cause I know we all have our annoying habits plus I was bullied as a kid so I really value friendship. Thing is with her what started with making superficial comments or being selfish evolved onto way worse things.

She's a compulsive liar, not minor things but serious things as well and she doesn't even try fir them to be hard to notice it's as if she assumes everyone is stupid and won't notice. Whenever I've told her I know you're lying on this she would try to make me seem paranoid and if I didn't backtrack or even dared to proof why I know it instead of apologising she would say "yeah whatever" and then don't talk to me for weeks.
One time she told me she was feeling poorly and doctors after some test suspected she had a brain tumor. I was so sad and worried for days then I bumped onto her mum and asked how she was doing, turns out it was all lies and she just fainted one day cause she was skipping meals. I confronted her and she tried to emotionally blackmail me saying I was making her so upset she was having panic attack, then blamed her mum saying she's the one that lied cause she was struggling to deal with her sickness etc I stood my ground so next day she had her mum call mine (we were already 22 at the time) to try and convince her to make me act as if nothing happened cause she was suffering and in pain because of me cause she loved me so much.
I didn't speak to her for almost a year bur after some time she reached out to me and I decided to give her another chance and we slowly started to hang out again.

Long story short we slowly became closer than before but then things started to pile up again: more lies, both big and small, and she would be nice one day then treat me like $#%^ the next. It got to a point when ever her mum wouls allow herself certain comments or treat me like her daughter's maid. Specially when we hang out with other women she would make a point to make subtle digs at me or even straight-up mock me. One time it was so bad I got really upset and left table for a few mins and even her now husband told her to let me be and stop being cruel. She put on her big Bambi eyes and fake apologised and because I'm stupid I guess I let it slide again.
She would also ignore me for weeks at a tome when I was the one texting but then the moment she wrote I had to drop everything. I had some serious medical issues with my mum and brother this past years and she was #######5 support and would get bored if I needed to vent about it.

She lives abroad now so when she visited her family I'd make a point of clearing out my weekend for her just to make sure we could meet but instead of appreciating it she would take if for granted and let me know last minute or become angry if one time I had other things going on I couldn't cancel for her like family emergencies. One time she ended up in hospital and the moment she told me I immediately went there to be with her, I was the only one to go and the one friend that always made that kind of effort for her but the one she treated the worst.

Still I tried to keep calm for years but last one was last straw. She was awful, selfish and ungrateful on another level. The humiliating comments were on another level, the lack of support when I needed it was non-existent, the materialistic and superficial behaviour in general reached disgusting levels. Everytime I heard from her I was drained for days, I dreaded meeting with her and she would take up too much space in my head.
It was her wedding year and I was the one bridesmaid from her home-country to travel for thw hen do. Not just that but from abroad organised most of it with another mutual friend that is a good person cause the maid-of-honour couldn't be bothered and the rest of girls showed no interest on it we had to pursue them to get them to confirm they'll go. But then they're so fakely nice in person to overcompensate they're the ones she thanked while being #######5 to us 2. All cause they're most useful with keeping appearances in her social media which is all she cares about in life.

Last autumn after a few-years of many issues and stress I ended up having a nervous breakdown. Took me a few months to get better and in that time I cut out almost all contact with her. When I was doing better she started a conversation and she drained me so badly I got worse again for a few days.
I didn't think it was a coincidence so I decided to cut contact for a while and see what happens. It was life changing, like some background noise had finally gone from my brain.
I did some reading and that's when I came across blogs and information on narcs and realized maybe this was the explanation for her behaviour cause so many things fit the description it couldn't be a coincidence.
I also wasn't missing her like I should with a friend so I decided to go one step further and without removing her from social media silencer her posts so the presence would be completely gone. I got better again cause everytime I'd check online I would dread the idea of her stuff showing up (and it's a lot cause she's obsessed with follows and likes)
But this she immediately noticed cause I wasn't pressing like which is very important for her. She started to tag me on random things, whenever she wanted me to see sth she felt made her important she'd try to start a conversation, she started to post about things I like and she never did and make sure I see by texting to try and force a connection...
That friend we have in common became one of my best ones long ago cause we have a similar personality and share tons of hobbies, we have even gone on a couple trips together even though we live in different countries and send each other bday or random gifts from overseas. She got jealous and started to hang out with her to get back at me and wouldn't leave us alone with constant texting on our last holidays.

Now the recent incident:
I'm kind of a nerd so my social media is very random. Last Thursday in between a bunch of videos from shows I like I re-posted one quote that said true friendship is shown daily and not by posting a pic that says I love you online. I'm free to post what I want but I did cause I agree with that view. Many friends saw and liked or told me they agreed but apparently she took it as a personal attack (she wasn't tagged or anything).
She didn't say or do anything herself though of course. Next thing I know her husband is deleting me from social media and kicking me out of an streaming platform (we always got along really good cause I love sports and did some favours for him so he gave me password time ago). I was confused so I texted him and he replied telling me to stop being a kid and give his wife a break... followed by a fist emoji. Apparently now I'm a bad friend that makes her suffer. And the fist emoji made me feel like he was threatening me.

I realized what it was about pretty fast and told him childish is his wife saying nothing and getting him to come after me. That I haven't even spoken to her in months and it's not my fault if she reads that post and takes it personally and if she did it's probably cause she knows that's what she does to people. He replied saying the post was rude and I'm a bad person and he's had enough of me. I replied after everything I've done and how patient I've been with her treatment I don't deserve this, many other things I wanted to say but I started to get very nervous and upset so I told him I never wanted to hear from them again and blocked him everywhere before he got a chance to reply.
Then I texted her getting her husband to come after me like this is the last straw and to never reach out to me again and blocked her as well.

Whenever I've tried to get away from her she gets her family to reach out to me or my family to make it feel like I'm the bad one for being upset so I blocked them all too and warned my family cause I don't want that to happen.
Some friends I've known for a while have told me it's for the best cause they both will just gang up on me but someone else told me to block them like that without giving them a chance to reply is aggressive and makes me seem like I don't give people a chance to express their feelings and I should listen to what they have to say or give her a call to clear the situation.

Did I do wrong by just blocking them like that? I don't like doing that but I'm so tired of giving her chances and I got really mad she was such a coward to make her husband do the fighting as some way of what, intimidating me? I'm not even sure why she'd keep quiet ans act like nothing about that post but behind the scenes create this confrontation.
I also feel bad blocking him out like that cause I feel she's manipulating him and trying to get him to isolate himself or make him seem like odd so when she dumps him she can blame it on him. I know she has already complained that his family and friends all hate and mistreat her. She has a history on this cause every single bf she didnt like their families and friends and has accused them all of being secretly abusive when she's done with them and already met someone else. Last one she even called cops on and I want to believe women on things like this but I've gotten 5 opposing stories of what happened and another friend told me another one so I think she just wanted to destroy him.
Because of this and certain comments and things I've noticed I've felt for a while she's scheming sth when it comes to him but I don't possibly see how could I make him realize that I'm not the evil one here cause she obviously has been working him hard on how bad I am. He seems to really despise me now and didn't want to listen to what I have to say which is why I ended conversation like that but my gut is telling me there's a reason she played nice and said nothing to me while making him go unhinged and that me and him cutting contact like that is part of some greater plan. I say this based on my experience but also feel like I'm paranoid and seeing plots.

Am I crazy for thinking she's playing some game here? Is it mean to just block a friend like this after so many years? No matter her flaws maybe I didn't handle this well and could have done sth else?
How can I not make him hate me so when the time comes I'm able to help him out? Was I rude by just blocking them like that to avoid being reached out? I'm not rude but I didn't know what else to do at this point and I know she's going to go around trashing me to mutual friends for reacting like that.

Really sorry for the post length and if someone makes it to the end thank you. There are 500 things going on in my brain with this and I'm unable to sum it up without missing information I think may be important.