I have only taken 2 quilting classes in my life. The first one was free because I bought my machine there. They failed to inform me of all the supplies that I needed for the class and didn't even have the book available for purchase that the class was centered on! They only had me bring a focal fabric. I then had to purchase background fabric and sashing from them. I put my foot down at buying the binding and backing. This was a 3 part class and I only attended the first one. There was one lady that insisted on personalized attention from the instructor and everybody else was left to figure it out for themselves. Also, the instructor wasn't sewing along with us and she never once got out of her chair to come see if we were doing okay. I hate that dealer/store for more than one reason; I refuse to spend my money in there. I bought my machine about 4 years ago and I have only been in there twice since.
The second class I paid for but it was held at my favorite LQS. The class was small, 6 of us, and it was a FMQ class. I learned alot and feel pretty confident in FMQ smaller items. I have no desire to FMQ a full size or larger quilt!
Most specialty techniques though such as paper piecing and applique, I have taught myself by watching internet videos and reading books. You have every right to be upset by how your class was handled. You tried the classroom route, you didn't like how it was handled, so now you know!