I'm so sorry you went through that.

My gut reaction is that you should talk with your T before you quit and just hear what he has to say about why he did that. If you still feel he's untrustworty, then terminate. But give him a chance to explain.

Also, I feel that trust goes both ways. He needs to trust that you won't seriously hurt yourself, and maybe he was doubting that based on your actions. So he erred on the side of caution and made sure you were safe.