As far as going to an ER, it's definitely possible. But it's a complicated situation. I have a dog who would be homeless if I went into the hospital and he's also my caseworker. So he refuses to help me figure that situation out. It's an important one, as my dog is a major part of my recovery and I will not leave her behind. Even he claims that I cannot leave her behind, but he will not help me find a solution.
As far as his upper. I have gone to her. We sat there for twenty minutes as she told me how great he was and how much she loved him. It made me so sad because I felt that I could not tell her anything after that. That she wouldn't believe me anyway. I've even tried to bring it up with my psychiatrist who works with him as well, and my psychiatrist actually got upset that I dare claimed he wasn't efficient at his job.

And the only parts I brought up was how I felt I needed another therapist because my time with my current T wasn't productive or good for me. I feel that my therapist is manipulative enough to have got uppers on his side. I even told him this. (hey honesty is my policy). I told him I felt he was manipulative and he just laughed at me. Having PTSD, it's part of the survival mechanism to pick up on subtle cues like this.
There are people he works with I could talk to, like my past caseworker (before my case was taken over by my therapist) or the RN however they are below him and telling them would only put a burden on them. They can't do anything about it and talking about their fellow coworker would do nothing but make it awkward for them. "Gossip".