I feel you. Seriously.
You've clearly considered many, many options, but I've had analogous decisions to make in my own life and there are times when an unusual and radically different approach works well.
A lot of times those huge differences arise because of external circumstances, sometimes we're forced to endure them, other times a decision you make has profoundly unexpected consequences. And sometimes you have to make a conscious choice to make a severe change yourself.
Perhaps it's time to make a radical, conscious change in your work.
An anecdote. A close friend of mine divorced which ended up being the best thing for him.
Weirdly, not long after, one of my private students broke down in class. She'd been battling for some time to save her marriage. I explained about my friend's situation but she was vehemently opposed to divorce. A few months later, she and her husband were working towards reconciling. Actually seriously considering divorce somehow spurred her into finding a way to compromise. I've left out all the details but it was thinking the unthinkable that seemed to be the catalyst she needed. Something radical,
Sorry I can't offer anything concrete, only vague unactionable suggestions that are probably unfeasible.