My ex was a golden boy as well - handsome, charming, one of those feminist new age men that claim to genuinely like women and be really involved as a dad. He would remind me that he was better looking and more of a "catch" than me - I was lucky that someone like him would put up with someone like me, because I was awful in unspecified ways. He was also paranoid, mentally unstable, manipulative and drinking as much as he could get down his throat.
The shiny veneer doesn't last. It really does seem that alcoholism is a progressive disease, and unless the alcoholic stops drinking everything will fall apart, either slowly or quickly. Ex is pretty much a train wreck now, and it's visible to anyone who talks to him for more than 10 or 15 minutes.
Your AH's time will come.