Or that the internet is full of mean losers. Your premise assumes anyone with an internet connection is successful and I very much doubt that assumption holds water.

Not really - I've seen some pretty mean people back in high school, because high school is one of the places where people are forced to be together, no matter what their preferences are.

But once one becomes an adult, there is a much greater leeway in choosing whom to interact with, so it is often possible to not interact with mean people at all.