My T has said that one doesn't need to like a T in order to do effective therapy. Putting that in context, he's also said a lot of his job is trying to get people to see how much agency they have in themselves.

I think taking your T's advice and dealing with group T shows a great deal of maturity and progress. It's not easy to deal with people who have been invalidating whether intended or not. Good luck with the meeting. You can do it. Keep using your voice.