Maybe you need to exam a little more of why you don't like the class--is it just that you are being taught in new ways? If so I'd stick with it and see if there's something I might learn that would appeal to me.
If you aren't liking the class because you are not enjoying the class members, the teacher puts you down for having other ways to do a block, etc. then maybe you need to drop the class. But if that is the case, let the teacher or the shop where you are taking the class know the reasons so they can improve upon their classes.