I think, fundamentally, you have different ideas of what the problem is.
From your point of view, the problem is the way that you two fail to work together, the serious money problems, his lack of respect for you as a person in your own right and the fact that your relationship is pretty much dead.
From his point of view, the problem is that you keep whinging at him about how unhappy you are.
So he's temporarily solved the problem by giving you the same old lame promises - "yeah yeah, I'll not work so much, sure, I'll help out with the kids more, whatever, I'll ditch the things that bug you etc etc."
He thinks he's hit the Snooze button on the alarm clock of your dissatisfaction. I seriously doubt he's actually going to do any of it, or if he does he won't keep it up for long.
That's because, from his point of view, the problem that needs to be solved is you getting on his case about how crap he is. He thinks he just needs to keep giving you the same fake promises, keep hitting that snooze button, and you'll carry on putting up with the same old shit day after day, week after week, decade after decade.
The bottom line? He doesn't believe that you will ever leave him so he doesn't believe he really has to change.