@chiefthunderball A lot of times the weapon is not the blame. If you are seeing a knife go through someones chest there are a few factors on how and why this would happen. The main culprit would be ping. Depending on your ping or the person you are shooting at could differ and not register properly at that moment.
The knife operates as it's intended to. It's not poor programming or terrible game upkeep. Just because you have issues aiming with the knife and hitting targets does not mean its the games fault. Since we do not see many if any posts about the knifes accuracy I am leaning towards the knife being fine and some weird other things coming into play or just complete misses.