I believe that there is some part that cannot be influenced by anyone. It is just who I am and something I am born with. Maybe not with social phobia itself but I have been given traits of character that, if deepened, cause social phobia. But that is only one part.
The other, much bigger part is entirely something that I have experienced throughout my life. And I believe everything comes from family. No matter what bad experience you had in you high school, with a caring family, you will get through it and still feel socially accepted and worthy. It is your family that shapes your confidence and in some way, identity, sense of belonging and sense of what is right and what is wrong. They are the ones that somehow inflict in you your future interests and ideals, help you develop your skills.
So yeah, I blame my family for who I am now. Because if not for my parent's divorce, my brother's constant demeaning of me, my dad's huge trusting issues and my mom's aggressiveness and inability to perceive that she might be wrong sometimes I'm pretty certain I wouldn't feel like I don't deserve anything no matter how hard I try.