There are lots of gentle, informative people out there. If you are uncomfortable with this instructor, look for another. For example, if you post your questions here, you are almost certain to get positive, helpful advice. Many of us, including myself, came to quilting for the pleasure it gives, but without a strong desire to become a great quilt artist. We don't need someone telling us how imperfect we are, rather, it helps to hear what we did well and have our questions answered. I might not be the quilter I am today if I had not had such a teacher.