Granite, how you see things is not the same as how another sees them. The other comes from a different "base" so even if you say something horrible to your T, about your T, your T is not thinking bad things about herself so what you say does not have as great an impact as you imagine. I keep the phrase, "Your mother wears combat boots!" with me in the back of my head and think about all the possibilities of someone saying that to me or me to them. Remember the taunts of childhood and how they hurt but would not hurt as greatly now but just seem a bit "silly" perhaps?
Even if you told your T what a "lousy" therapist she was and of no help to you at all and she should quit her day job and do something else

etc. your T has more clients than you and if 99 other clients and her boss and teachers, friends and relatives think she is a great therapist, the impact of how you feel (which, is coming from outside of them) is lessened. What
we say is about us, not about the other person. I'm sure your T feels badly that you are hurting so much to have said whatever it was you said.