there are some people that are legit just good COD players...emphasis on someI don't know Ap, no denying that there are campers.
but due to latency and lag and shit, cod basically comes down to who sees who first on their screen due to their connection. That requires no skill at all
so if you're playing a mode where the bullet damage is higher and the bullet sponge shit is lower, that's not skill. That's camping to find the spot to least likely give up your location
if you wanna talk about skill, youtube Counter Strike Go