So, what's a person to do?
Shut up and train?
No, seriously. But it sounds like that's what you're getting at?
I don't care if the instructor is a total knuckle-head. As long as there's nothing abusive going on ... and no-one asked for your opinion ... their dojo, their rules.
These are hard questions to answer.
Actually, not so much. You're responsible for your own training.