Chero, I can relate to that want to hate him but you can't sooo much.
This is the first of my exes it seems impossible to reach a level of hate with.
My other exes, no problem.
I'm thinking it is because A's tend to be of the Jeckyl and Hyde sort, and logic tells us 'only if' they would fix themselves you would want them to be a part of your life again.
From my experience alcoholoism is like a self-induced form of Schizophrenia.