It is actually the game’s fault. Mutes and blocks are a last-line defense, not a first-line defense. Others games do proper moderation and will properly foster a positive community, and while they might have toxic people in them, they cannot be toxic as freely as LoL allowed them to be. Unless you are like, comparing it to a Call of Duty lobby, which is a meme on it’s own for the same reason. League is starting to get around to banning people more actively but they should have started over a decade ago.

Player to player interaction is very important for people to enjoy multiplayer games and it’s one of the reasons for people to prefer them over single player games. You can’t always know who’s an toxic moron ahead of time, and it’s unreasonable to cut out all of the primarily positive interactions with people because of a few idiots who act like schoolyard bullies and try to put everyone else down at any moments and create a negative atmosphere. Trash talk is fine, but the kind of people that say “EZ” often do so at times where they’ve already won. In other words, they’re punching down, and they’re bad winners.

If you do that at a real life sporting event, you’re not going to be welcomed back. Because if you ain’t got anything nice to say, don’t say anything at all. And for multiplayer games to survive you need both good winners and good losers, otherwise the only people that are eventually stick around are the toxic ones.