They want to do this so they can find themselves in the right lobbies in Microsoft’s (Activision Blizzard) first-person shooter.

One of the biggest flaws in Call of Duty: Black Ops 6 is matchmaking. The problem is that players don’t end up in lobbies that are appropriate for their skill level. Call of Duty’s online multiplayer has had a few problems since the beginning. One is the fact that respawns can be learned by some, and newly released players can be taken down by others in no time, and another is the matchmaking system, which used to be much more limited.

Many players remember the older Call of Duty episodes for the lack of skill-based matchmaking, while others want to be pitted against players of similar skill. Some believe that Call of Duty: Black Ops 6 has found a solution to this problem with engagement optimized matchmaking to keep players busy: if you find matches unfair, just quit. A post on Reddit explains this in more detail.

Friendly monthly reminder – Just quit games.
byu/sw3ar inblackops6

It says that players should quit until they encounter players of lower skill. After winning several matches in stratospheric play in Call of Duty: Black Ops 6, players are paired with higher skill players, which makes for harder matches. If you leave a lobby, you will take a loss for that match, but your stats will be hurt, although your kill ratio will not be skewed. The other option, according to players, is to deliberately underperform in a match, but this can hurt your team more drastically than just leaving the match. And some suggest fine-tuning your play style in the tougher lobbies to be more effective against more experienced, professional players.

Treyarch’s game has a matchmaking system that makes players feel like they are in matches they are expected to lose…

Source: GameRant