I have some flavor of this same influence at my core as well.
I get a little overly animated in my opinion and judgment of the people that have the audacity to attempt to lay claim to the title "Parent" like it is a right based on the simple act of procreating the species.
How could any person that has had the privilege in this life to not only take part in the creation of life it's self but also be trusted with protecting, guiding, influencing, educating and over all developing a thinking, feeling, loving entity that will live far beyond the influence of it's origins and become an influence it's self in the universe and not be willing to put a little more effort into it when it gets a little difficult?
How could any one that claims to be a parent ever think that kicking your kid out of the house was the best answer?
How could taking the easy way out of dealing with any issue ever have positive response?
They brought that life into this world and it came with some requirements.
Anything worth having is worth working for.
Fuck them they don't deserve your forgiveness.
They did not earn the right.
They failed you. They failed them selves. They failed the universe.
Good for you for raising yourself the right way since they dropped the ball on that.