https://www.gamespot.com/articles/thanos-comes-to-new-fortnite-mode-gets-nerfed-imme/1100-6458801/

A new limited-time mode in Fortnite, Infinity Gauntlet, is now and gives you the chance to play as Thanos, the Marvel villain. He's as powerful as you'd expect, but in a move that could have made Avengers: Infinity War a much shorter film, Epic Games has nerfed him already. Just hours after Infinity Gauntlet went live, Epic has decided that Thanos was just too strong and toned down some of his stats in order to give more players an opportunity to take him down.

Epic also says it'll "continue monitoring feedback" in case further changes are needed, but this should give more players the opportunity to get a shot at playing as Thanos. The Infinity Gauntlet mode sees a comet crash down early in the match, leaving behind the gauntlet. Whomever picks it up becomes Thanos, but if that player is killed, the gauntlet is dropped and someone else gets their chance to role-play as the Mad Titan.