Your "rider level", in my book, has little to do with how well you can post the trot, jump a jump, or canter your schoolmaster. I can make myself look pretty good on a quiet, easy going pony. Your rider level more so depends on your ability to solve riding related problems, train your horses to do new things, and identify the causes of problems.
Why is my horse bucking? Is he stupid? Or maybe it's back pain, a saddle fit problem, or nothing else entirely. How did you come to that conclusion?
My horse won't pick up her left lead? Does she hate me? Or maybe she's stiff on one side, or even testing you. So... How do I remedy that?
Speaking of, how do you do on horses that test the rider?
I can't tell you how good a rider you are until I see you solve a problem.