As someone who myself was a teenager once
yeah fo'sho, I do have a little bit of experience of the teen experience. I remember back to those days when I wasn't so worldly aware through travel and daily life, of the innate similarities of "all" people. Much of the 'angst' was a whole lot of wasted time.
Yeah, teens can be dumb, I remember being so myself, they can be cliquey, yet parrot the societal ideals of inclusion, but yet are cliquey, they can exhibit all sort of hypocrisies, but no more so than adults that also exhibit all sorts of hypocrisy.
Unfortunately alot of adults don't have enough empathy to reassure teen readers that things aren't all bad, they'd sooner piss n moan about injustices, divisions, fears and claim the moral high-ground, while viciously booting everyone else off, said moral high-ground, as teens also do, sometimes.