backgrounds, with all kinds of points of view.
it's your opinion the kid was a 'bully'. that may be, but it may also be that he thought he was the victim.
reviewing the reasons he received the grade he did in response to his concerns was a good way to handle it, and apparently it satisfied him.
as for the 'mental case' stuff: of course there *are* 'mental cases,' but there's also the case of teachers or admin labeling dissatisfied students 'mental cases' because they don't like them or find them troublesome, or misunderstand their behavior.
i have a personal anecdote too: i was teaching at a community college, english remedial classes. i had a student, he was kind of a screw-up (slept during class, didn't do the homework, etc.). he did the same in everyone's class, i was friendly with him & just kept reminding him he was screwing up & would fail if he didn't shape up; eventually he did (when he realized i was serious). the other thing was that there were some differences in the education system that may have played into his lackadaisical attitude.
another teacher took it personally, her veiled hostility made *him* more hostile so it got worse. at a teachers' meeting she declared he had a mental problem and needed a referral for psychological evaluation. omg. the other faculty didn't feel the same, so that went nowhere, thankfully, but it could have since she was also an administrator in the department, and it would have had bad results.
she was one of those super-sweet butter wouldn't melt types (until you crossed her, lol). some students love that type and she did great with those students. some students hate that type, and this kid was one of them. just personalities, but she wasn't used to not being loved, so she decided it was a mental problem.