Smartest thing you've said on here so far.
But you have made one mistake in your reasoning, which is an understandable mistake. You interpret how you're treated in your upbringing as personal. It wasn't, it just felt that way. But if it wasn't you someone else would've been subjected to the same treatment. It's just that people who behave in such a manner make it feel personal to make it seem that much worse.
Also you do have quite a victim mentality. This tends to bring out two responses 1) It reveals to bad people that you can be mistreated 2) it can have a negative effect on how people perceive you because you don't know anything else to talk about.
It would benefit you to approach people in a manner other than 'this is what's wrong with me' and instead just talk about other aspects of yourself that aren't perceived by you as negative, or even on subjects other than yourself. Establish a link with a person that isn't based on you speaking negatively about yourself. This will change how people view you early on, as well as how they may treat you.
Often people raised in hateful environments show the affects in their body language, speech and behavior. We already know your speech/behavior has been affected. So it's a sure bet your body language displays it too. This is like an alert to jerks that you are easy to mistreat.
All this can change, but it takes time and a lot of work.
