Just because someone can fly well doesn't automatically make them a good instructor. You have to understand the learning process, and the fundamental skills needed as a foundation to learning to fly. It is exceedingly difficult to correlate what your inputs are actually doing if you are behind the airplane and fighting to catch up. Until you can correlate your inputs to the planes reactions accurately you will continue to struggle. Trying to reason with him, in my opinion is a waste of time. You need to find someone that will take the time to teach you the basics and allow you to build on them at your own pace. The problem is, for most would be instructors, that can be very boring as a flyer. You need to find someone that loves to teach and finds the challenge fun. They don't have to be the best flyer, an average flyer that is knowledgable and willing to take the time to teach it right will do the job better.