I have talked about other T's in terms of what worked and did not work. I have not had any awful T's, but have had really traumatizing experiences with other mental health professionals (myself both as a professional, and as a client, but on separate occasions with separate people... I don't think that makes sense... sorry). I do want to talk about the grief surrounding the loss of most recent previous T though, just have not gotten to that yet with new T.
There was one t who dropped me as a client at a really bad time, and the T who I switched to was pretty mad at her for her handling of things though. I was more hurt at the time, but looking back, that T should have handled things better. She wasn't horrible, but she got in over her head then disappeared. The T I saw after her had a lot of pieces to help pick up from that.