I taught teenagers for a long while, the things about teenagers that are annoying are also so very relateable. They're full of hormones, incapable of handling their emotions, and way too busy coping with all of that to be in school.
A lot of adults seem to have amnesia about that time but spending time with whole classes of them makes your own experiences of it flood back.
Like when a guy you liked didn't say hi to you in the morning and you had a whole existential crisis that nobody would ever love you, cried in the toilet at lunch time, then decided you were a strong independent woman, got over the whole thing, by the end of the day you were like "screw him, I deserve so much better!" then you saw him leaving school and he was like "Sorry I didn't say hi earlier, I had my headphones in" and it wasn't actually a thing at all? That's basically being a teenager all the time.