My parents were fucked up too. I spent a lot of time in Al-Anon and Ala-Teen growing up. I'm not sure if they have those in your country, but it's basically a group of people who have addicts in their lives, who talk about how it affects them.
You would be surprised at how much common ground you will find yourself having with those total strangers. The most empathetic thing in the world, when you are ashamed or saddened about something, is to hear the words, "Me too." and you will find that and more in those groups.