Okay, I got your PM, I tried to reply but it doesn't get sent, so not sure if you now have me on ignore for not replying originally with the answer you wanted or if the darn thing just isn't working.
You asked for an opinion on the person in question, however i'm not sure what you want it for. I won't go into detail about what type of relationship we had, or what ended it, let's put it this way, it obviously ended, so it was bad enough, why the need to rehash the past for someone I don't even know.
If you've ended the relationship for the reasons you claim, and not for what he told me, then wouldn't it be in your best interest to leave him alone, really, if he was that bad of a person to you, why continue the open line of communication?
I will answer one question you had, yes, alcohol is the major factor here, and unfortunately it hasn't changed. He has learned to live his life through what he see's, feels and/or hears while he's drinking or drunk, not when he's sober and able to enjoy it more.
As for your concern about whether or not I will be there for him or not after the inevitable with her, it's going to be a tremendeous loss in his life, that I understand and expect, it will have an impact on me as well regardless of our distance right now, and at this time I really dont have a truthful answer for that. As angry as I am, probably not, but as much as i love her and know she is his world, absolutely if he called, but it's not something that I am planning my days around. So whether or not your also a contact he is going to use when he needs friends, makes no difference, my support would be just that and nothing more.
So, if that is all the issues that are out there, I think it's best that you keep from contacting me, I may not like him right now, but i'm not going to give you any type of ammunition against him that you seem to be looking for, sorry, try someone else.