Welcome Hurting, First of all I want to give you a virtual hug (((((hurting))))
I am so sorry you have suffered so much abuse. When a child is born into an abusive household it becomes your "normal". It's all you know and makes you even more susceptible to cult indoctrination. The person reasons that conditional love is better than no love at all.
My hubby and I had mothers who falsely complained to all who would listen how difficult and disobedient we were. We have come to understand that it was a ploy for sympathy and attention. (a form of Munchausen by proxy) It worked beautifully too- our families avoided us and still do. Since most loving parents don't talk smack about their own child our mothers were believed.
Sad to say, these people have no natural affection are are toxic. In order to preserve your own mental health you must set firm boundaries possibly even avoiding them altogether.
You have come to the right place to receive understanding and support. Take care and keep posting.