Coco: I don't know your teacher so I will not make any judgements on him. The important thing here is that you are convinced that he is a good teacher for you and that he is willing to be more demanding with you once he has seen your commitment to the arts. It is difficult to make a living by teaching the arts. Sometimes teachers have to cope with "less tha ideal" students. They pay for classes and they have a right to learn. Most oriental teachers who have come to the USA have had to modify their teaching approach. The way things are done in their home countries will, in many cases, not work here. There is a lot of information around that will help you determine if your teacher has the right knowledge. If that is so, and you trust him as a person and as a teacher, stick with him.