This really makes me wonder; kid suicides and the pressure in school as a causal factor is something I have heard of from multiple trustworthy sources in the US, including teachers.
When I was growing up most teachers ranged from strict/disciplinarian, to casually mean, towards the kids who were lazy and/or didn't understand things. Even really great teachers that were otherwise kind and really helped kids did this - e.g. one (of the kind, helpful ones) would make sarcastic jokes at the expense of kids who didn't do their homework, making the entire class laugh at them (one of the gentler ones that I liked was "oh, you forgot? It takes special talent to forget something when you haven't bothered to read it in the first place!" or smth like that).
Some of my college professors said things like "you have to understand how this concept works, or next year you may be trying to understand how Kalashnikov works" [as an expelled conscript in the Russian army - basically a prison from which college exempts you].
Still, I do not know a single person in any of my classes in school or college, or anyone I knew really, who has committed suicide... and to the best of my knowledge nobody has attempted it either.
What is special about the culture/upbringing/environment/... in the USA that makes pressure and "meanness" (for the lack of better word) such a problem for kids?