This is far more rare than you'd think. When you're playing games at the highest level it's not just skill, there's a layer of play where you're basically exploiting because you're so in tune with the game you can take advantage of effects that last milliseconds.
When I played competitively if I joined a random server, I'd sweep about 1/3 rounds. I took the moniker fishy because I'd been banned from so many servers for "hacking" and an admin said "IDK if you're hacking or not but you're fishy..."