Why do people pick on LeBron/ Kobe?

Yeah. He wasn't a good sport. But hey,everyone makes mistake. He was just too depressed of what happened. It's just a childish trait of the fans, they try to turn down the other player to make their favorite player look better. But that just doesn't change anything. That won't change the way players play. It won't change anything, so why do it? Why criticize players that did something wrong? They are humans, not robots. They have limits.