I want to ask my question again. Do you anticipate have a focus on WAH after the divorce? Will you go to extraordinary lengths to avoid him? I get it's tough with living so close, but you can't avoid him forever.

About your kids. I will say this. My parents divorced and my dad left. My mother was probably like you. And my dad did some shady stuff with the support. She never remarried, she didn't even date (we encouraged her) but I don't know the real reason. However, to this day all of us kids see what she did for us after the divorce. We see my dad for who he was. He tried to buy us nice gifts and cars, etc. He lived in a much nicer and bigger house. We lived in a small apartment for 10 years. He went on trips and lived quite a life.
But it never shifted our opinion. I think for a lot of years my mom thought that he got a better life after the divorce. But now I don't think she'd say that.We all basically have little to no contact with him. He's missed out on his grandkids and celebrating all our achievements and lives. His relationship with the OW (yeah he married her and had 2 more kids) isn't great. Full disclosure: his kids from that marriage are a mess - drugs, jail, etc.