They don't understand why there is no teamplay. On smaller maps there are bascially a bunch of individual players using the noob tube, laser SMG and continously knee sliding and evading only been killed, not because they have any skill, but because the hit detection fails even harder when someone is moving faster than normal. They don't revive, they don't offer cover for their squad, they are only playing for a high KD.
So do the devs expect everyone to play like this? It would almost be team deathmatch. The devs are 100% responsible for this, if you give people an easy option to exploit a game they will take it. Knee sliding and being able to shoot at the same time is basically cheating.
Knee sliding should be removed from the game and every gun have 200-300% extra recoil added.