feels like I just exercise, work, and sleep

I feel that. If you have a job that gives you a balance of days off, make sure you are using those! I know i have been bad about that in the past and it contributed to burnout.

I realized they mistreated me all my life and I hate them…I don’t know how to tell them that I’m retroactively spiteful

This is really hard. I don’t know your whole situation, but this seems like the kind of situation where you will never really get to share your feelings with them unless they realize they made mistakes that they should apologize for. Otherwise, sharing your emotions seems like it’ll just lead to more mistreatment. But that’s just my two cents, and I’m no professional. I hope that reading and drawing is restorative for you ❤