How best handle a 33 year old bully?

The best way to handle bullies, is to NEVER react to them in the response they want.

Be proactive. You need to stand up for yourself.

Use VERBAL AIKIDO to redirect the bullying back on them.

Counterattack with a Question. Respond everything they say with a question.
Example:
Attacker: You’re a stupid idiot!
You: Are you impressed? Are you looking to become one as well? Are you asking for advice on to be a stupid idiot too? What’s with the attitude, did your girlfriend break up with you?

The Expert Counterattack
Example:
Attacker: You’re a stupid idiot!
You: Yeah, and you would know because you’re the expert on stupidity.
You: Yeah, and you would know because you’re the BIGGEST idiot in the room.

Hope that helps and give you some idea.

Remember, never react or fall victim into their predatorialness.