One of the first classes I took at a LQS was just like this. The teacher would hold up your piece and ridicule your mistakes. I never finished the class or the quilt. Luckily I knew I wanted to quilt so continued on my own with books.
I recently signed up again at this same LQS & teacher (a friend wanted me to go with her) and the teacher is still the same. Even though I am not a beginner anymore and so she doesn't single me out I am making the quilt on my own again because I can't stand listening to her quilt police talk.