why do people hack?

Whenever I am getting killed by a hacker, it's just so nice to think that they are just a kids who gets beaten up in school or just plays bad, but it's just a half of this case. Most of their exuses are all alike: "lol i'm good at this game lol i just got bored lol you suck anyway lol", or "i m not cheteng i just play good", but come on, those guys are just bad at video games