I'm a bit confused because I'm not hearing that she didn't tolerate your criticism. You said she behaved very professionally and the conversation was civil. My suspicion is that sometimes therapy relationships end because the client shows they really aren't interested in pursuing therapy (which you suggest is true). If you only call once in a while during a crisis, the impression for a T could be that you simply want to maintain the attachment, rather than to engage sufficiently enough to progress and become independent of them. Many Ts don't continue under such circumstances, and some might even believe it is unethical to do so.

I really don't hear anything that suggests to me that she's rejecting you personally, but rather that she's recognizing your on-going lack of interest in being in therapy, and responding from a place of professional ethics. It certainly would have been better had she explained that clearly.