Dude .. if you are really saying "That guy must've sucked" then you should be a newgen and even more than a newgen. UltimateRush a.k.a Amaz0n even owned Burgz in 1v1. His aim is for real 10/10. Every shot is a hit. And no, he isn't UCing or other shiz. He is legit.
Go on youtube and type " gunz amaz0n " and look at his videos.
Edit : His aim on this vid isn't that good but the vid is so old. His aim now is 10/10.