I empathise. My mother and step father were abusive. My mum has a number of mental health issues and spent periods of my childhood in psychiatric hospitals. Stepfather died of his alcoholism. When I was in recovery for my addictions I did a lot of work on my psychological scars from all this. In DBT therapy.
We recovering addicts don't shy away from the damage we did to others as a result of our addictions. In fact we have to confront it directly in order to recover. Step 9 of the 12 Steps is where I had to contact EVERYONE I wronged due to my addictions, admit what I did, LISTEN and internalise their feelings about it, and make amends. Importantly, the other person is not obliged to forgive and we are told we should not demand nor expect forgiveness. We may not deserve it.
Not gonna lie it was HARD. Not many people have to go see a friend or relative they've not seen in years, sit in front of them, admit to all the dreadful things they did and then listen to the other person's perspective. I had to learn humility. It definitely shocked me, and made me a much better family member and friend. Part of ongoing recovery is working that every day, making amends where we go wrong.
So yeah 12 step recovery, a big part of it, is directly confronting all the harm one did to others as a result of one's addiction. This means that 12 step recovery is hard but also I believe why it has the highest proven success rate of any addiction treatment.
Anyway, I am sorry for all the hurt you suffered and wish you nothing but the very best.