If all they did was to pair up KDR's into [ranges] it would fix the majority of issues and many (many) more players overall would actually have the opportunity to enjoy the game.
Both my and several of my clan-mates KDR's are higher than most but not anything stupid high. When I play say legit 1.5~2.5 K players none of the hackusations are flying around and I 'get' their thinking (less the hackers), but when I play e.g. 0.3~0.9 KDR players frankly it's not any fun for any of us. I want a challenge and they get understandably tired of being killed.
Most of them have a disadvantage from PC related issues, time played, (PC) equipment disparity, set-up, ISP, or etc versus someone that will take a few hours to fine tune and tweak a PC's FPS for every map, a good ISP and has thousands of hours playing FPS games.