Sorry to hear your H is an @$$. I would suggest that you not go out of your way to accomodate him. Tell him because he moved out it is his responsibility to figure out how he's going to talk to the kids not yours. Then just walk away.
It will be tough, but if you keep giving him what he wants, he's not going to have any desire to try anything.
Think about him as a kid. When one of your kids is crying and screaming because they want a certain toy, do you give in every time? Of course not. You just ignore them and eventually they settle down. It's that same mentality.
You have the perfect opportunity for things to turn around right now. When he comes over, just ignore him as if you were the happiest person in the world. Start going out and GAL. Go out with the kids to the park. Just something. The more he finds out that no one is paying attention anymore, he's going to rage harder than ever, but you stand strong.
Eventually he's not going to have anyone else to blame but himself. You can definitely do this.
M-43 W-40 2D - 9 and 5
Emotion, yet peace. Ignorance, yet knowledge. Passion, yet serenity. Chaos, yet harmony. Death, yet a new life.