引用自 CS2 - Competitive cooldowns and bans：

Counter-Strike cooldowns and bans are non-negotiable and cannot be removed or reduced by Steam Support.

VAC has flagged your gameplay as irregular

Players who VAC determines as having irregular gameplay will be disconnected from the match and receive a minimum one day competitive cooldown regardless of their current cooldown level.

Cooldowns issued for irregular gameplay prevent access to all game modes for the duration of the cooldown.

VAC flagged a member of your party's gameplay as irregular

Players who party with someone who is disconnected for irregular gameplay will receive the same minimum one day competitive cooldown as the disconnected player regardless of their current cooldown level.

Cooldowns issued for partying with a player who VAC disconnects for irregular gameplay prevents access to all game modes for the duration of the cooldown.