Dropshot/Jumpshot Why do players refuse to adapt?

Why is so many players get upset if they get killed when someone dropshot/jumpshot? Is it really that hard to aim up or down? Or you could learn to do it yourself it's not hard. When will people see they lost the gunfight because they we're OUTPLAYED Period. It's like there to stubborn to adapt or to stupid if I kill you more then 5 times dropshotting and everytime your just shooting up not aiming down who fault is it? & before someone comments it's not a glitch they nerfed it in this game and yes it moves  the hit box by moving that's the point so you miss. If you have quick reflex's you can quickly adjust your aim & get the kill stop thinking your enemy should have to stand still during a gunfight.