Shadowverse

most people who play games are boys. Boys don't apologize to each other for winning; on the contrary, they try to solidify their victory by further humiliating their opponent.

Dota players with borrowed moms. There are a billion autistic (male) individuals on the internet who despise toxicity, haughtily grimace, and consider themselves refined and proper, and they don't do that. I would even say that the majority are like that, with the exception of a few cesspools like Dota. Although, those types quickly get reported and drown in their own low-priority matches with other toxic players.
In general, you can go into any online game and check – statistically, about 20-40 percent of players will behave badly in various ways, while the rest don't try as hard.