Boredom/Frustration

I don't know how much this is a BPD-related thing but I keep finding myself completely unable to have an interest in anything, and the boredom is making me frustrated to the point of being overwhelmingly angry. I keep switching between idle distractions that don't engage me enough to be properly distracted, and I get more and more frustrated at how bored I feel, which makes it even harder to focus and stay engaged. I end up feeling so angry that I want to rip my own skin off or scream until my throat gives out and it's unbearable.

I keep switching between this and being so intensely engaged with something that I can't do anything else. Can't sleep or eat or move, I can only focus on this one task until I fall apart. I also keep switching between those two states and intense dissociation, and it's driving me insane.

i relate a little,i am not angry but sad because of it,it makes me feel that is not worth living sometimes.i feel unable to have an interest in anything.
i guess i like watching movies and music . And if i ever find something that i like more ,it becomes so precious that i can't think of anything else/exactly because there isn't anything else that makes me feel like this. but at the moment i don't have something.
if you don't feel passionate about something,what is the point waking up into a painful nothing everyday for so long.when you feel bad you are holding on ,it makes me wonder what am i holding on for,is it worth it.are small things worth it.for how long.
i don't feel angry more like a painful nothing,i can be angry for a while but i don't see the point in being angry either lol and just go back to feeling nothing

Are you more likely to get bored with people or things? Are you more likely to become obsessively interested in people or things?

I certainly can relate to the feeling of boredom. Personally, I often think of the boredom as a form of emptiness or lack of meaning/purpose. Suddenly, it's like nothing really matters anymore, nothing seems interesting, etc. I think it's a terrible feeling and it just hits so hard all of a sudden. That's probably why I sometimes consider them a part of my BPD mood swings.
I have a few thing I like to do in a day, at the moment these include reading, solving crosswords, listening to the radio/songs I like, and doing exercise, currently the latter consists of swimming in the local indoor pool and walking. So far, swimming hasn't become boring yet (maybe because I just started doing it this week ), but it's physically challenging so of course it affords some self-motivation. So let's just take the crosswords as an example, I might suddenly find myself wondering, "why am I doing this, it's boring right?". And then I'm stuck in that painful situation of having to come up with something else to do - which isn't just laying down to sleep and make time pass without having to think or feel anything (though this is often my go-to solution )
Also, I often think of new hobbies I'd like to engage in or things I should be doing the next day, errands I should be running etc., but somehow I often fail doing these...
In your post, you describe getting so caught up in certain activities that you can't do anything else, until they become boring. May I ask what these activities consisted of?
Have you ever thought of making a daily plan for yourself? I often think of this myself, you know, making a plan for each day by writing down what to do, when etc., so I have a structure to follow and sort of like a "security net" that can catch me once everything turns boring and grey and meaningless.