Do whatever it is you want to do relentlessly. If you quit, that's on you. If people fucking with you bothers you enough to make you quit, also on you. You seem like you're already in your own head (no offense) so just will yourself to do it buddy. My dad called it testicular fortitude lol. Best wishes going forward.

Forget about people you went to school with and bullied you. They don't matter going forward. You are in control of your life, and I promise that you are ahead of alot of people your age. Self pity is the quicksand of the mind. Never quit pursuing happiness