Stuck was what I thought I was, too. There are always other choices.
It sounds like a power struggle to me. I can choose to remove someone else's power over me. If I didn't need the money right this minute, I'd let it be. If there is a mediator for separation, have it signed then. Going to court? Have the judge order it.
I had to stop expecting AH to do what I wished he would.
Good luck with whatever avenue you choose.