If you're doing so well that you're saying CoD starts treating you as a cheater, then what's probably happening is you're playing people below your skill level until the matchmaker adjusts.

Then once the game puts you with people closer to your skill level, the best of them feel like they're cheating (and to be clear, some definitely are, but to the people you were stomping you also probably seemed similarly clairvoyant with impossible aim and movement)

Skill based matchmaking is controversial, but the truth is more games have been killed by an infinite loop of skilled players stomping new players so badly that the new players never become skilled players, than the opposite.