The student could "help the instructor learn how to help".
This depends in large part on the student. If the student is an adult, one would hope the student has the skills necessary to do just that - but the way you presented it sounded pretty demeaning to the student, and why should someone pay for instruction to be demeaned? Also, while that would be the moral high ground for a student, it
should not be necessary - which doesn't mean it
isn't necessary in a wide variety of circumstances - but were I that student, I would be much more willing to teach an instructor how to deal with my particular difficulties if I had the impression the instructor valued my presence.
If the student is a child, then the instructor's response is unconscionable. Children should not have to teach adults how to teach them.
The instructor could take the time to sit down and do more research about the particular challenges faced by his students.
And, IMHO, the instructor should have done just that. I get frustrated by my students at times, certainly - but I do my damnedest to
not show that frustration to my students - and that includes a man who has been in my class 5 or 6 years, who has CP, a developmental delay (IQ roughly 65), and poor social skills. He drives me nuts on occasion - but I
don't tell him that, and I do my best to not let him see it. His disability is not his fault, and he does the best he can - and I can't ask anything more than that. There was a lot of trial and error, and a lot of checking with other special ed professionals like the occupational therapist, when he started my class - especially since his parents wouldn't tell me anything beyond "he has special needs" - but he's still there... and he's the only person I know who had his contract not renewed at a well-known McDojo in the area, because of the difficulties inherent in teaching him, and the level of disruption he can cause.