Sometimes when i just stand completely still, and i scope in on the enemies head and tap once, the bullet hit a pixel behind him and doesnt register, why does this happen, the enemy is standing still too

Hello, is there a straight answer to whether it is better to crouch or to not crouch while spraying? Thanks for the answers.

​ [He added me in a spikerush, said he was diamond two, and after the game I add him back and see this? In his career hes only played six games, and throughout all previous acts he hasnt been ranked anything. ](https://preview.redd....