Here are some responses. Sorry if they sound contradictory!

* Your T admitted failure and accepted responsibility for that. That's a rare and precious thing.

* What I'm hearing is that you have already decided to leave.

* Seeing another T will provide a contrast that will help clarify what you loved and hated about the previous T.

* Fighting with a T and then talking about that fight with the same T has potential advantages over talking about that fight with another T.