Our background and circumstances may have influenced who we are, but we are responsible for who we become.
There has to be a statute of limitations on just how long you can blame your upbringing for your life today. No one had a damage-free childhood, we all accumulated issues. Some experiences were worse than others, but no one comes out completely unscathed. So you enter adulthood with issues, little or no confidence and a blank slate.
We came to this planet to learn and our parents are one of our first and usually our greatest teachers. They, too, have their issues and can only teach you what they know. Most have done their best to provide the standard requirements for a good life, and then there are some that only provided negativity and heartache. Whichever upbringing you have endured has made you who you are.
Now it is up to you to decide who and what you want to be from here on in. It is now your life and up to your to mold yourself into what you consider the perfect human. Take what has been provided and work it into what will make you happy. It will do you no good whatsoever to sit and stew about your lousy past, and it will do you no good to whine about each person that has done you wrong.
Whatever has taken place is done, it cannot be changed or fixed, you can only move forward from the position you are in at this moment. It is your decision, don't waste your life in the past, you are responsible for who you become.