I have just started with a new T for childhood trauma who has a bit of a different style to what I ex...
Speaking as a therapist, myself...If your T does something that makes you uncomfortable, the response is to tell the therapist that.
I doubt the therapist will be uncomfortable if you explain how the emotion she is sharing bothers you. It's a T's job to handle such things. If she cannot handle that, and gets upset or blaming with you, precisely when you tell her that this much emotion is hard for you, then she is not meeting you where you are. That would reveal a problem in the therapeutic relationship, and her abilities as a T.
But even the greatest T cannot read your mind.
If you are uncomfortable, she can see that, but she cannot know precisely where your discomfort comes from unless you tell her.
It is entirely possible that she is trying to help you access your own difficult emotions. You have clarified in this thread that emotions are hard for you to manage, and you prefer to avoid them. And research is clear that learning to manage our own emotions and encountering the emotions of others are extremely important in life. It helps as much with career as it does with family and friendship relationships.
She may be doing something very right, and helping you confront your emotions. Or she may be moving way too fast for you, or she may be doing what she thinks is right without getting a clear sense of what you need right now.
No matter if it is one of those, or something else, the response from you is the same:
tell her what you said here about feeling like it is up to you to rebalance the emotions in the room. Then, she ought to respond by asking you to talk more about your response, so she can deeply understand it. Tell her what you don't like about it, and
ask her what her goal is in acting this way.
She may be the best therapist you could ever have, but only if you respond to her honestly.
And if she turns out to be a kook, responding honestly will flush that out sooner than later.