Hi @BorderlineGirl
I think it's normal to feel some level of resentment to our parents when we know things that happened to us as a kid continue to have an impact in our adult lives. How we were parented does influence our personality, coping mechanisms, relationships etc
I have a lot of resentment towards my mum about so many things but a big one is that she never let me do anything. She wrapped me in cotton wool, told me I was "too small" or "too fragile" and that has not only given me lots of regrets but also means as and adult I'm lacking confidence and independence.
It can be really hard realising that you are the way you are is because of stuff your parents did or didn't do.
Having said that I still love my mum and now I as an adult am choosing to forge my own path. Up until just a few years ago (and I'm 30 now) I would still ask my mum when making decisions even though it had absolutely no bearing on her life. But now I am taking charge and not worrying so much about what she thinks. Don't get me wrong, it's hard to change a lifetime of beliefs about myself but slowly and surely things are getting better.
You too can choose to continue to be the shy girl you grew up as or you can challenge it. Whether than means finding someone who can help you work through it (a psychologist can be a good start) or something else, it is now your turn to call the shots.
I think we'd all like to be able to say our parents did right by us, but I guess they were probably struggling too from the way their parents were to them. Not saying that they are blameless, but unfortunately we can't change the past. We can work with what we've got now and it's never too late to start getting that support you missed out on before.
All the best x