Emailing things that you can't express in therapy can be a problem. It's like your therapist has two clients instead of one--one that shows up and is inexpressive/hard to read and one that emails with criticisms of therapy. I know it's hard, but the only way to make this work is to bring these things to session to talk about instead of emailing them. If you need to email, maybe try using it as a way to say what you'd like to talk about at your next session. You have legitimate concerns (being told to look happy? yikes!), but emailing them is not the way to resolve them. Do you otherwise like this therapist? If so, it's worth pushing through. If not, well...