Have you considered how to bring this up in a way that might actually be productive and work towards a solution rather than "I've had it with you and your cold attitude"? Might be a bit put-offish and set up an immediate barrier to useful communication.

I wonder if something like, "I am not feeling a comfortable connection to you and that's making it hard to really open up and get to the depth of things I need to talk about" (or something along that lines) would be more useful. Speaking in "I" statements might help focus on how you are feeling as opposed to what she is/isn't doing. Maybe add, "One thing that would help me feel more comfortable is a simple routine for greeting and departing so that the end of sessions don't feel so abrupt and cold." I don't know. Problem solve with the therapist instead of just accuse and stomp off (I'm jesting a bit with you there.)