I've had this too, but not as often. Here's an example of a power struggle. Before they agree to do the lesson, I typically tell tutors I want an informal conversation with minimal correction. New teachers, or tutors without degrees usually get it, but often more experienced teachers will agree to do the lesson, then spend a lot of time asking me what I want during the lesson. When they finally admit that they understand I want to talk to them as a friend would, we start the conversation. They often give me rapid-fire questions and either don't reply or briefly reply to my questions before bombarding me with the next one. If I chastise them for this, they often become completely passive. I'll chastise them for that, and they'll say they are just trying to get me to talk. Then the final straw - they'll say they can't talk to me as a friend because I'm a student. The last time this happened I asked the tutor to pretend she was my friend, and that actually worked. But usually if they use the final straw, the lessons comes to an end.