I think that is a brilliant step flower, the therapy.
It's good you have a lawyer lined up, so you will have your information and be able to move forward with that if you decide to.
It's your timeline.
Are you detaching at all? I notice you said you have these ridiculous arguments - well what he says is nonsense and he has become really good at manipulating you.
The solution for that is to detach. You don't need to allow yourself to be drawn in to the alcoholism. You don't need to participate in the insanity, how about just observing, not participating, because what is the point?