Yes, there can be a lot of narcissism showing up in alcoholics, well in anyone, it's on a scale, but alcoholism seems to bring it out, or rather has a similar presentation in many cases, but not necessarily true NPD.
It's not ok for him to blame you. Accomplishes nothing. I hope that you aren't taking his criticism to heart. Now, none of us is perfect, however, his attacking you with blame and insults is about him not about you.
It appears it is just handy to have you there to say what a terrible person you are, therefore his lot in life is so terrible he must drink!
Well isn't that sad. Isn't that skewed thinking.
Sorry if that sounds harsh, having trouble mustering up any concern for people who decide to dump their anger on someone else. It's not right.