Lots of really bad advice here, which is pretty sad. "Get ready to take abuse in the real world, kid" is a rather fatalistic attitude to have. While you're always going to have personality conflicts in the workplace, that doesn't mean you just have to let people steamroll you, or that you shouldn't learn how to advocate for yourself. Even if the instructor isn't technically "abusing" you, you're still paying the school a lot of money to learn there. You're their customer, and you have every right to ask that your needs be met. If this instructor isn't teaching you anything other than being afraid to do anything lest you be berated, that's a problem. Constructive criticism is one thing, but it sounds like this goes beyond that. Administration might be interested to know how this instructor is conducting themselves on the floor. Yelling at students isn't professional behavior, especially if it's in front of clients.