So sorry you had a bad experience in taking a class. I have taken many classes, and have never had such a terrible experience. I would ask for my money back. Do you belong to a guild? I have taken 20 odd classes through my guild, and all of them have been great except one, and I still learned a lot from that class, but the teacher's attitude was lousy. I've also taken classes through my LQS, and those were really neat, I'm still trying to get into a PAMPERED QUILTERS sewing class, they cut all your material, do the ironing, and offer to do the ripping, if the case arises. She is a very experienced quilter, and are is her helpers, and she gives you a choice of pattern you can choose from.
But the class is always full by the time I hear about them.
I have also taken classes at Sister's annual quilt show (12), I went 4 years in a row, and all their classes are superb.
I'm sorry you had a bad experience, but don't give up on classes, just try a quilt shop, or even a guild in your area next time.
Good luck with your next class.
Lucinda