Why not surrender at 10?
This would really cut down on the toxicity of the game especially when playing with trolls.
My problem is trolls and afk's. Literally played a ranked game with a troll Udyr who did nothing but frustrate the team and intentionally feed as our jungler. He did this know I was first pick and had chosen to jungle so he set off the team dynamic in the beginning. So in this case i feel there certainly needs to be a earlier surrender or extreme punishment. This was only my 3rd ranked game ever I don't really think I'd care otherwise, it really sets me back as far as rankings go.