I agree, the knives are very hard to use or get used to. When I first started I though that the knife would have to land on the player during the swing, and it didn't matter where the crosshair was. But when I found that out I realized that it was absolute BS. Because that would make it impossible to hit a fast moving target, especially if they're shooting you. It feels as though knives are only used as a "joke" kill for afkers, campers, and most of all snipers.