is it justified if you get angry at everyone who is doing better than you?
is it justified if you get angry at other people just because you got lower grades than them?
true sometimes you do feel like shit when such things happen, when you don't meet your own expectations.
but does it give you any right to tell them that you hate "clever people" like them?
you don't like all your classes because apparently, they are filled with "clever people".
wth.
so you only like classes where you can be the top student.

if you want freakin' straight As, work hard for yourself.
blaming everyone else for doing better than you is not a solution.