Hmmm, at my first session with current T I said that actually right then my biggest problem was my T (now it's my ex-T) and she agreed with it. Since then we've talked briefly about stuff which happened during sessions with ex-T but I guess I also was worried that it might be not very appropriate to "complain" about another T, so I was just saying what happened and how it was making me feeling but I've never said that he was stupid jerk etc My current T let me know few times what she thinks about his behavior/responses but in my case it was not a big deal as he didn't do any crime nor anything really unethical, most probably he had just no idea about trauma therapy, so we didn't "click"...

It looks like your previous T still bothers you, so in my opinion, it is always worth to talk about it and I guess Ts should be trained well enough to be able to deal with it... I always assume that they have already heard much worse stories and it makes me feeling better then...