2 weeks ago, you were hoping to repair your marriage. While he's said some nasty stuff, you genuinely seem very angry. I can totally get why you would be.
You also seem very much to have made the divorce decision yourself.
If he wants to do things together, isn't this the chance you have to show off how you're improving as a person despite all this stuff? To show him that repairing could make the two of you happier than him running off? To show him what a healthy relationship looks like and feels like instead of his addiction?
Take the olive branches as they come. Cuttiing him off is like telling him to go and get into another relationship asap and to never think twice. It is giving him one more excuse to use if he has an addiction.
