Hi CC, I don't do AA, but I don't think you have to go back to everyone you've offended if you've lost contact long ago.
The bit about your parents is something different. You may have to accept that they will never realise what they did to you. It's not their job to 'fix' you, that's your responsibility. Think of it as you being the first person to break the chain if your parents aren't capable of it. That will heal you much more than anything they can do.
You know what's right and wrong, act as you would like others to act towards you.
Some therapy to deal with childhood abuse might help you put your childhood in perspective.