I completely understand why her actions would make you feel so hurt. By no means have I gone through what you have nor do I fully understand what that is like, but the issues I have also stem from my childhood and not feeling like I'm worthy.

I think part of being able to get past this kind of stuff is being able to accept yourself for who you are and loving yourself before you expect anyone else to love you back. It makes sense that if we don't love ourselves, why would we think that anyone else would love us or care about us. Being hurt by others is a pattern (that I have fully experienced as well) and can be stopped by being able to provide ourselves with whatever we are looking to others to provide for us (acceptance, validation, support, etc.). My T helped me realize this and although I am not quite there yet, I'm working on it. It's really hard and some days I go right back to where I was before but having an awareness of why we feel this way is important to start to create change.

Holding a grudge against your T isn't going to make anything better, it is just going to put up a wall and prevent you from growing. You already seem to realize this, it is just hard to get past it. If you're going to be angry about it, be angry about it but maybe grieve it in the sense that it stems from your family and be mad at them. Your T should be able to help you work through this and once you do, you can focus solely on you and what you're going to do to change and reverse the effects your childhood had on you. The great thing about therapy is it allows us to change and you're given one person who is dedicated to helping you change. Your T is your partner and she can help you, it won't be easy, but that's why she's there