what's with smurfs and talking shit?

So I am leveling my smurf just chillin and my jungler does some potato shit and doesn't follow up an invade, no big deal, sets me behind a bit of xp but no big deal, little later theres a fiesta at top and i die, jungler gets kill, but he totally fucks the wave up and i try to ask him to fix it he doesn't, again i assume hes just some new guy no big deal don't care if I'm behind cuz ill win game anyway, just little more challenge,

but when this terrible smurf mongoloid retard tries to get mad that I am behind on xp at like 5 minutes in and flames me in chat, what gives these terrible people smurfing from the depths of hell the audacity and ego to talk so much shit?