OP, I suspect you feel you're getting a hard time on here. You feel tired and on a pointless treadmill, and now there's a way off it so why can't you take it!
From the outside, though, it just seems like such a common story. I'm not suggesting your husband is a bad guy, but it does sound like he has ingrained ideas about how families should work (I.e. mum does it all), and it seems to be disproportionately affecting you. All the steps of the way are understandable, but you end up worse off!
I don't know what you did before having kids, but now you've had them and presumably stayed home at least for some amount of months then it made sense for you to go back to a lower hours role.
Then, because you had been at home when the kids went to daycare or wherever it made sense for you to consider that money compared directly to your salary.
It also made sense for you to do most of the work with the kids, as you'd been around them more.
It made sense for you to pick up more of the housework, as you were at home more. And the longer it went on, the more it made sense for you and not your husband to do it because you had routines, and experience, and ways of doing things.
And then you end up now, with a job that is full time, albeit less hours than his. But when you add in all the extra work you're doing, is he working more hours? And if not, why can't he step up at home?
Because then you're tired, and overworked, and used to thinking of your salary as almost pointless as cancelled out by daycare. While he spends more time focussing on his career without distractions, probably becoming more successful, and then it makes sense for you to step back even more! Until you may as well just leave work and stay home, becoming more responsible for kids and home and he has a successful career and successful family and easy home life paid for by your sacrifice of career and independence.