Also, 2 Donks, fine to quote the FARs, but bear in mind that there are not a panacea for all evils; Have you ever read Dick Collins feelings about the past requirement for flying a light twin, on one, low level, around the minimum control speed?
F3G
May I say that I think you are too tied up in your own story and not in that of the original poster.
He was in a 152 with, so far as we know, a C of G that was perfectly acceptable. By his own admission, he mishandled the recovery from a stall, and was failed by the instructor.
Your advice was to swap instructors, and I disagree with you.
It is as simple as that.
Meanwhile, I'll keep on with the FARs and the PTS. Bombproof they are not, but they are far clearer than the corresponding lack of documentation published in JAR-land.
And as a PPL with a few hundred hours stick time (and over 200 on the PA28)
In passing, I reckon it could be a mistake to talk about your experience as a way of fortifying your position.
2D