jackthedog be gentle with yourself ((hugs))
You are getting divorced - YAY!! he will no longer be your problem.
No one changes by magic nor by keeping company with someone.
He is the same exact person.
Remember why you are getting divorced in the first place.
You mentioned an AH with a recent DUI, an active addict. He has a chronic and progressive disease. No one ever will change this fact.
Anyone around someone like this deserves compassion. They might not know the ride that awaits them.
They might be joining SR at some point asking for help dealing with the madness.
I am glad it won't be you, anymore. You, already in the road to a new life.