You said you had a very good relationship before and that is what is important is to try and hold on to that memory and feeling.
It sounds like you were hurt that your t didn't care and wanted to cover his own arse. Maybe this is a little true but from I am sitting reading this, it's a very different story but I have no feelings or attachments to your t. From here it seems as though your t did care very much and wanted to keep you safe and the only way he knew how was to be hospitalised.
I know it's hard when you want t to do more or show you more support but sometimes being hospitalised is all they can and the best they can do at the time.
Hurt and anger come from the same emotions and I think if you could try and work through this with your t your relationship will become stronger. Emotions are heightened within the therapeutic relationship and sometimes we can't control them but they are always worth exploring with your t.