I'm not sure my answer is going to be what you want to hear but here goes.
I'm an alcoholic and I have never - and would never - treat anyone like that. I have a lot of self hatred for the lack of control I have shown over the years with drink (2 to 3 bottles of wine a night - every night - with very, very little time off in between) but my destructive behaviour hurt me mainly. Sure my wife worried about what I drank and nagged me to stop (in this sense I hurt her I guess) but I meant it (mean it) when i say I love her and I never cheated on her.
Take Taz as another example (I hope he doesn't mind?) He abused alcohol and is an alcoholic. But he held his marriage together for all that time.
I think that some people use the drinking as an excuse for an appalling lack of morals and consideration. Drinking numbs the senses and lowers inhibitions but it can't be used to totally excuse anyones behaviour or lack of empathy to those we are supposed to love.
I'm afraid from my perspective he sounds like he would be a loser drunk or sober. Sorry - but there it is.