Everyone in my friend group is between 20-26, and for the guys it’s mostly been dealing with their self image. Their careers aren’t what they thought it would be, and most struggle with trying to get to some ideal body standard.
For the girls, it’s even worse. Most of them have been diagnosed with an eating disorder, probably due to the constant influence of people they see online.
So in a nutshell, the aspiration to be the same as “everyone else”, which eventually disappoints when they realise that what they want is unobtainable without drugs, surgery, luck or other extraordinary measures.