how the hell is it that a head glitcher can can fire 4 to 5 bullets with in 2 seonds then crouch back down but the 5 guys trying to snipe him cant get a bloody hit they need to fix this

see my team had rushed the enemy and killed most of them  on studio except this guy camping with a riot shield and a mk48 and all 5 of  us had our snpers pointed at him and none of us could kill him because he kept popping up for 2 seconds fire 4 bullets and duck back down  he ended up killing all 5 of us  how is that fair how they can fire that many bullets in 2 seconds but it takes 2 to 3 seconds to fire at him and still miss even with all of us aiming for his head they need to fix it and some how but he has deadly  accuracy  how f***** is that  they need to fix this