I get the feeling that short games are mostly due to people giving up instantly than anything else.

I keep getting teams that go "gg" pre 10 minutes when the score is something like 7/3 or bot has died twice. It's not over. It's only over when they kill our nexus, that doesn't mean you should randomly give up and go super aggro and waste the next 10-15 minutes until it is time to FF. Yeah. Some games are absolute stomps, I can't disagree with that. This meta causes it too. Even with a stomp meta (or whatever you want to call it) most games end because one team gives up early and throws it. I'm not saying #NEVERSURRENDER I am saying -Don't quit and fight until the game is over -Don't stress when you are behind, play safe and punish the enemy for mistakes. You don't need to 5v5 brawl them over that wind drake -Don't turn the game into ARAM when it's past 20-25 minutes. push side lanes and apply pressure all across the map -Don't FF if your comp is late game -ETC.