Almost all of modern problems can be traced back to social media.
> Loneliness epidemic: people having too high standards due to being exposed to minority of super pretty/handsome people on social media and dating apps and feeling like someone better is always a few swipes away
> Attention seeking and stupid trends: people do all kind of stupid shits for attention online and other people copy them hoping to get more attention
> Societal division (on gender, race, religion...): it existed before, but today it has been upped to the max because of algorithms intentionally pushing divisive opinions for more clicks. Same goes for conspiracy theories and other stupid stuff.
> Increase in depression: similar to first point, people see successful (often fake) people online and feel inadequate or like they are failures
> Alienation: people replace real relationships (friendships etc.) with para-social and pseudo-social relationships online.

There were always successful people and dumb stupid people but they never had a platform which disproportionately amplifies their importance and reach.