The Modern Warfare and later Call of Duty games, in particular, made some really frustrating design choices that amplify the difference between players. The powerful rewards you get for success can turn a close-enough-that-everyone's-still-having-fun match into a not-even-close misery-fest for the losing side. It's a hell of a dopamine hit when you're winning (which is why people like it) but it really messes with the balance of the games.