Sorry to hear you are still struggling with your employer! I don’t really have any advice to offer. You have to do what’s best for you and only you can know what that is. Is there any possibility you can work from home?
I wish you could have my situation (I work from home doing the books for my hubbys contracting company). I realize everytime i need a nap mid afternoon, can’t get my joints moving in the morning or make my fingers move properly to type how lucky and fortunate i am. I hope you find a situation that works for you.