Yes, when I read about her mocking you I kind of wanted to reply but didn't know what to say.

Congrats on realizing, yourself, that you felt invalidated. And reaching out here again.

I've had experience with a T, too, that when the therapy had hurt me, and she had an inkling of that, she defensively shamed me, probably because she felt "responsible" and there was nothing she could do about what had passed and her participation in it. That may have helped her to feel better in the moment but ultimately her defensiveness made things worse for the "relationship", and my trust of her.

I'm so sorry this is happening for you. Is there anyone else in the treatment program that you can talk to? This is clearly affecting your treatment and I hope there is somebody there in the program who might be able to hear you. If not, maybe some of the other participants? Maybe some of them would have some ideas?