It’s called a grind for a reason!
I know you’ve spoken to a therapist type person. Have you ever spoken to a social services case worker? Anytime we take kids into police protective custody, they get a case worker assigned to work with the family. If you can get in touch with someone like that, then you might be able to get some help getting out of the house. It’s going to be a battle, but what do you have to lose?