I was supprised

Dakiras: You also have to consider that there is a difference in game pace when it comes to a dungeon-crawling game compared to a game where it's about winning and competition. Not excusing the insults, but adding further perspective to the revelation. The atmosphere differs from one game genre to another. If you look at MMORPGs you will see that overall it's quite a calm experience, then you get to more challenging content that requires some teamwork and insults can start flying. If you look at competitive first person perspective games (Counter Strike, CoD, etc.) insults are thrown at the slightest thing. MOBAs are the same.   It's to do with game style, but as you say it's really worth looking inward before you comment outward at someone else's performance.