I too have witnessed much of what other posters have said here. One of the common problems I see is a trainer who is so clearly out of touch with their client and the training session. They clearly seem to have a “standard script” of exercises that they use with a client regardless of whether those exercises and the intensity involved actually suits the specific client. I then watch as the poor client tries their best to perform. You can see them looking to their trainer for feedback, yet receiving none. It’s terrible to see this and I often find myself just shaking my head and having to look away.