Do they diagnose and prescribe however they please without even listening to the patient?

Do they diagnose and prescribe however they please without even listening to the patient? This is the first dermatology clinic like this I've encountered. They should listen to why the patient came and what's bothering them before diagnosing, but they wouldn't even let me speak. When I asked something I was curious about, they said, 'How many times have I told you? I told you twice,' trying to lecture the patient. I will absolutely never go back. I came away stammering and unable to say anything. I was truly dumbfounded..