Biggest difference between kids and matured league players
Attention span.
Kids have short attention spans, they get bored of things very easily. In league this transfers to the inability to play from behind. They only want to stomp the enemy, they don't care about strategy, they don't care about sportsmanship, they just want to stomp and win in 20 minute. If they can't they immediately start giving up and look for another game. Which is why in the summer it is much more often to see people who start flaming 5 minutes into the game when the score is only 0:1.
https://s-media-cache-ak0.pinimg.com/236x/0d/b0/12/0db012dc893a87775852b56572f8e2fa.jpg
Seriously I hate playing league with 10 year old kids.