Lots of kids have various mental health disorders at this age.
Olympic level athletes suffer from eating disorders and depression-- and “burnout”.
Young men in the military have high rates of suicide- depression, plus access to a weapon.
Young people who don’t go to college- they live at home, in economically depressed areas- and they are Oxy addicts.
Young people who live at home, don’t go to college, and get good jobs (relatively) right out of college and guess what- they suffer from burnout too. No longer the football star or the prom queen.
I would hate to draw the line between “Kid is depressed or burnt out and it’s because he wanted to go to Harvard so badly”. This entire age group suffers from a wide range of mental illnesses and only a tiny fraction of them can find Harvard on a map, let alone aspires to go there.