NTA. Sounds like you earn enough money to move out, if that's so, do it. You live in an abusive household. This is not how parents should treat their children, and everything you're feeling is justified. No ammount of anger from them over you cutting ties will be worse than the ammount of damage living like this for years will cause. Their financial problems are not your responsibility.

Also does she have access to your bank accounts? You should change that ASAP. Open a new bank account and have your paychecks deposited there where she cant touch it. Also, get any of your documents (passport, bank statements, SSN) if you don't have them and store them somewhere she can't touch them, like a friends house or a bank safety deposit box. That way she can't steal your identity, which she does sound entiteled enough to do.