JMKid sorry to hear you have an idiot ex like this too.
He once said to a mutual friend that it had gone so far wrong that he didn't know how to fix it. This is after countless times when I had reached out to him to try and get him to see the dc. -I don't do that now mind, I tried for a reasonable period of time, but you can't force someone to change. He was and is so black out with me that he can't bring himself to talk to me about the dc. (Mind you, I currently have a six month non-molestation order against him, but that's another story!!).
The stupid man has been through three or four new girlfriends since I kicked him out, it all goes the same way-they must believe him at first when he plays the poor me she's a bitch card, but I know from speaking to one of the recent exes that these girlfriends, all with dc of their own, cannot get their heads round why he isn't seeing his children. It's corrosive, and he's doing nothing to address it, just going deeper and deeper into denial.
They have all ended up dumping him.
I will say one thing-I would rather it was this way than if he was coming in and out of my dc's lives chaotically (his life is generally Jeremy Kyle style), messing with their heads. It's not ideal, but at least with just the three of us they are steady and stable, and are now totally used to the fact that they never see him.