Remake Flaw
At the start of a game my teams top laner (i was jungle) decided she wouldn't play the game out as she was not given mid by the system, and no one wanted to swap their given roles with her.
So instead of just dodging during champ select (or saying anything about it to let anyone else dodge the game) she waited until the game started, walked to lane and stood at her tower (without items) and then disconnected as soon as the first minion wave spawned.
No option to remake. complete waste of my time and a loss of LP that really shouldn't have happened.