MCU: The Worst Thing EVERY Avenger Has Done
12. Captain Marvel - Not Getting The Gauntlet From Thanos
Okay, this isn't really Captain Marvel's fault considering that Thanos overpowered and outmaneuvered every other hero that crossed his path, but the MCU's newest hero's record is so squeaky clean in her one and a half movie appearances that this is the only remotely questionable part of her journey.
A force so powerful that she single-handedly decimated Thanos' mothership in seconds and was completely unphased by that massive headbutt, it feels kind of silly that she wasn't able to overpower him during the Avengers' last stand. Sure, his move with the Power Stone was very clever, but the first time he swatted her away, he wasn't even wearing the gauntlet.
Had she gotten it away from him, she could have defeated him in minutes and Tony Stark would never have had to sacrifice himself.
Again, not morally corrupt or criminal, but an unusual blemish for someone used to getting things done.