I think even in a communist society, the failed experiment which is social media would have resulted in a lot of isolation.

Being exposed to a lot of beautiful, charismatic, multi-talented people creates a perception that the one witnessing is not as special.

Even within tighter local communities, I could see how a teenager could form a perspective of their community being below-average in talent and forming resentment.

Of course, it's all speculation, and obviously capitalism plays a role, I'm just not convinced it's as significant as the role social media plays alone.