I am so sorry you are in that situation. It is awful to be squeezed between two unwelcome situations especially when one feels trapped. Wish I had some helpful advice but sadly I am at a loss.

When I was stuck in a toxic workplace similar to the one you mention, a psychiatrist suggested I imagine I was a doctor in an insane asylum and that everyone in my workplace was a mental patient.

That way I would expect people to act unreasonably and things generally wouldn't get to me.

I tried it and it helped me a lot. Of course that was a unique situation and so I can't offer it as advice to you or others.

Hopefully the members here will see your post and respond to it with things that are really and truly helpful to you.

It is awful when one is stuck in a toxic work environment and my heart goes out to you!