I've done something like this (don't want to go in details), and although I deserved an A with 100% accuracy etc. I got B. And she (the professor) said "hope t

I've done something like this (don't want to go in details), and although I deserved an A with 100% accuracy etc. I got B. And she (the professor) said "hope that teaches you a lesson". Also there were 4 different professors present. They all "took her side". It's just what they would do in all cases. It doesn't matter if it's maths (something that is absolutely objective) or philosophy. Anyway, some people are just small and with fragile egos, regardless of whether they are in academia or CEO's or anything.