I'm sorry that happened. He is still bound by confidentiality even if you are no longer seeing him and that is a breach of confidentiality. If he has no boss, I would suggest reporting his behavior to his licensing body. While they may not take action, it would be good to make them aware of it.
I would be leary of seeing another therapist also if something like this happened. It's one thing for you to decide to disclose, it's a totally differnet hting for him to do so. Very unprofessional.