I know what you mean, getting sniped in a split of a second through two open doors, ridiculous. (Cauldron) Another moment where the enemy runs through the door while taking fire and pulls off an instant headshot and walks away like it was nothing. Or even when I'm on the other side of the map and I get sniped the moment I peek my head out when my entire team is assaulting them from a completely different angle. I don't know how they do it either, unless they use aimbot but everyone claims it to be skill, I would not be surprised if people were that blind.