you got out of his way. that's all. he is doing exactly as he wants to, only know doesn't even HAVE to try and pretend to be a husband or father. you took yourself AND YOUR KIDS out of the firing line.
he is a remorseless self absorbed cad. and now his true colors are really showing in a blinding kind of way.
i'm sorry that you had an agenda when you threw him out - thinking he'd just wake up and embrace recovery and become the man YOU want him to be. instead he's being exactly the kind of man he is.
what steps are you taking to get some help and support for you and what financial/legal steps are you taking to protect yourself and children?
YOU didn't cause this.
YOU can't control this.
YOU can cure this.