Betrayal trauma... how do you get over it? I don't know. For me I suppose I trust only in my self. Our mother allowed our father to abuse us. She would literally tell us at age 5 or 7 or 10 or whatever... if you don't do it I will have to. Later when it all came out she denied everything and protected him. She did her best to discredit us.
How do you get over it? I trust in my self. I have my own back. I look out for me. Nobody can hurt me. I don't stick around for that kind of ****. Do I "trust" in our therapist. I suppose. But I don't in any way hand my self to her and relinquish my own sovereignty. We turn up each week and she does her job. But I would walk away from her in an instant if she ever did anything that might hurt any one of us.
I will never betray us. Trusting in that allows me to possess an unshakeable sense of safety.