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.

>>9
I think this portrays alot of american high schools pretty well, so why not japanese schools?