You mentioned people's pasts and that it had the potential to mold them into physical and emotional abusers and other types of people like that; that is an excuse.

Even if I can escape my parents and lead an happy life whether I forgive them or not what they did and continue doing to me will always be there and despite all that I have not hurt physically and mentally anyone including animals.

My parents did not have good childhood but they could have used that to be good parents but they instead decided to be worst than their parents were.