It seems you never had a healthy enviroment to study in. There is bullying and there is bullying. I myself saw some bullying in middle/high school, I never saw much at the college level.

I saw a lot more cases of people not connecting, being left alone, or people gossiping dislike privately. I do know adults bully, so my point kind of is that besides having a lot of experience in education (1 lower, 4 middle/high school, 4 college/university, 4 time leaving with failure), I don't have that much experience with it.

I would talk with a professional about your problems.

It seems you should leave your parents, then find the strength and confidence to attend collegle, without getting discouraged because of lack of external support. How to do this physically and mentally, I do not know.