Actually, I think these two issues are actually not the cause of the depressions. I think its mainly because people who are constantly on social media are: Not productive Not social Not fun.

I think its mostly loneliness. I see groups af girls just watching their phones together. Parents looking at their phones while the child is trying to get attention. It's the fakeness of it all.

The things you name the reasons why the social media is addictive. Not why it is harmful.