I never find their attempts at normalizing stuff to be useful, but I do think the therapist is trying to get you to see that your current life is something that you have created well - like you can give yourself credit for it despite your mother and how your mother told you you were horrible etc - so your current life is a sort of proof that you are not horrible and incompetent and useless etc. I don't think, from what you have posted, she is saying you don't need therapy or that you are just fine.