It has nothing to do with kd/r, it has to do with the basic building foundations of the CoD series being nerfed, gimped and left crippled to die a slow death. The foundation has always been allowing players to craft their own playstyle, but this time around SH has decided you'll be playing how they want you to play.
As many have pointed out, the lag is the worst in the series, the maps have no personality or hotspots and have an overly designed emphasis on verticality, the weapons are widely imbalanced, the killstreaks are severely underpowered and boring, and the list goes on and on. Furthermore, there's absolutely no map control or safety anywhere - the exo movement on top of bad spawns ensures that for at least half of the game you will get shot in the back.
I got all of the SP trophies sans exo-survival in about 4-5 hours. I consider myself a higher than average CoD fan and while there are some CoD games I didn't like (BOII), I have never come to hate one or stop playing it in less than a week. AW is the first game in the series that has turned me off, and in less than a week from release which is unfathomable. I can't stomach supporting SHG and the irreversible damage they have done to the series.
I've since returned the Xbox One bundle and if it were possible I'd return the PS4 copy, but it's been opened. The best thing I can do is trade it in so someone can by it used and SHG doesn't get a penny from the sale, and I hope it recirculates at astounding rates.
Tl;dr - as a big CoD fan this game is utterly and complete, rich, creamy shit. Stay far away.