I am so glad to be divorced from my version of this man (wasn't even my choice, left me for another woman after I forgave his first affair).
But sadly, it means that my teen daughters are trying to manage him instead.
Things my 13 year old has said in the last month:
-I thought if I cleaned out the pantry and gave him a grocery list he would actually GET groceries
-Does he not read his emails? Can he not read a calendar? Is he not an adult?
-He never hears a thing I say. He doesn't know the names of any of my friends or teachers. Does he even know MY name?
-There is one house on our block that didn't shovel. Guess whose? [Dad's first name.]
Both my kids call him "that guy" or "the other parent" or his first name or his name with "Schl" at the beginning, like Schleg for Greg.

I laugh, but also, they've had to detach emotionally because he's so astonishingly incompetent.
He is still just as clueless and deluded and arrogant about his own adulting skills. Having been a long suffering wife who made him look like a quasi functional adult, it is pretty sweet to see just how much he can't do.
I guess he was confused this year when the Christmas fairy didn't show up and fill his stocking. He made a big show of saying to his affair partner/girlfriend in front of the kids, "Hey, guess what I got in my stocking this year . . ." and then he was just silent. Get it, isn't that funny?!? She was like, huh? The kids were like, "You didn't tell us you wanted us to fill your stocking?!?"
Did this man fill my stocking when we were married? No, I had to do it myself. The irony is lost on him.
I was just talking today to a friend with a similar husband, about how he claimed he bought the kids Christmas presents, which means he ordered them each one thing, and one of it turned out to be a scam website, lol. But then he writes "From Daddy" on the one present he got while she buys every other present and writes "From Mommy and Daddy." And I was like, yes, I am so sorry, that was also me, and it is so much more fun to have the kids come home from his place complaining about how much he screwed up Christmas (didn't do any of our Christmas traditions because hey, why would kids of divorce need continuity) and declaring how happy they are for "real Christmas" to begin.
So OP, I just don't even know what to tell you. I spent the last few years of my marriage asserting myself more, focusing on my own self-care more, etc. But it was never close to being enough because a few boundaries were no match for the unbridled vastness of his selfishness and weaponized incompetence.
Honestly, I don't even know if it was weaponized any more. I think he's just incompetent, full stop.