Like @Echobelly , I have no plan to leave dh atm.
The biggest turning point was this summer. There was a couple of incidents where I ended up being very blunt. Telling him that if he did xyz again, then I wouldn’t step in to save him. Hed have to deal with the full force of the consequences.
i also made it clear then, that I was at my limit and he had to step up.
And to be fair to him, he STEPPED UP.
He stopped ignoring me for days on end.
He started to be supportive (remembering I’m disabled and housebound so lack of support there very quickly becomes neglect)
He doesn’t automatically react with rejection when asked to do something - which means he has taken responsibility for things he hadn’t for like ever.
So the very big difference is that he changed and made a huge effort.
On my side, I’ve let go of a lot of expectations he is never going to be able to do. Small talk, emotional support, negotiating/partnership.
I have a life that is calm, low affect, little expectation. And as it turns out, due to my chronic illness, this is exactly what works for me atm. (Appreciate that for others, it would be closer to hell).
Thats to say, theres scope for change.
The scope might or might not be enough for you
In my experience, the way you deliver your message re boundaries matters a lot, maybe more than with NT.