It isn't the games where you have 4 feeders and lose that show your character...
It's the games where the enemy team has an AFK that really show who you are.
Do you go LCS tryhardmode flashing and igniting for kills when you know for a fact that the enemy jungler can't be there to stop you?
Do you taunt the enemy team in /all chat? Do you honor the AFK after the game for handing you a free win?
Or do you accept that you get to have a free win at 20 minutes and goof around, trying to make the game fun for 9 people?
The next time you see "a summoner has disconnected" understand that right then you are making a choice whether or not to be a cunt to someone you will never see for no reason.