anime portrayal of high school

Is most anime portrayal of Japanese high schools sugarcoated bullshit?

I was watching All About Lily Chou-Chou, which I heard from doing a minutes worth of research is a fairly realistic portrayal of Japanese youth, and thinking how Japanese kids are fucking assholes not the well-mannered, old-fashioned teenage characters in most anime.

From what I got out of going to Japan, it seemed much like school in Inuyasha. aka, Tests and your scores are very important, and if you're stupid in Japan, and bring your class scores down, people will tend to not like you, (hence why Japan has the one of the highest teen suicide rates in the world) as opposed to America, where the more stupid you are, the more you're rewarded with sex, popularity, and the teachers will pass you if you don't turn anything in and will ignore you blatantly cheating on tests all the time.

Also you'll find that Americans are horribly immature (look at modern n00bs that only beg for stuff and tlk lik tihs LOLZ!!!onezor), and about anywhere in the world it won't be AS bad.