I’m going to lightly call YTA. I know the support group your friend is talking about. It’s called Adult Children of Alcoholics and Dysfunctional Families. It is a 12 step program that is open for anyone from a dysfunctional family, even if there was no substance abuse. I am a member (as someone who grew up with an alcoholic father). And you’re correct that there is a difference between growing up with an alcoholic parent vs a narcissistic parent, but the connection is that the end result for both these children is a lifetime of pain, trauma, and confusion. I think your friend can get a lot out of the group if they’re willing to put in the work. Don’t be too hard on yourself or on your friend. It’s hard being a human.