Rather than saying you don't like therapy with that person, I would say it is not a good fit or therapy with that T is not helpful.

Some (the nurse?) might interpret 'like' as you being difficult or being swayed by your subjective perception. It is not about liking, that T is not doing her job well. In other words, your therapist is, from an objective standard, crap.

So, if you cannot (up to you to judge how it would go down) tell the nurse this, I would suggest wording it in a more objective way instead of 'I didn't like therapy with X'