I'm so sorry your therapist made a sudden, irresponsible choice that hurt you deeply.

I personally think at times therapists use the notion of "self care" to let themselves off the hook for following through on commitments.

Your T should be in supervision on your case, and trying many things rather than breaking that bond.

In my opinion, therapists get away with this because so often, only two people know what goes on, the T and the client. There are no consequences for unprofessional behavior, unless it is draconian like sexual abuse.

I would like to see that change.

How about writing a few reviews for her that are emmintenly reasonable and truthful- two stars. I saw this therapist for years and trusted her. She compares seeing a therapist to seeing a hairdresser though, and does not take her responsibilities professionally or seriously enough etc. . .