20 minute FF creates Toxicity.
You want a toxic free environment so bad? Remove the 20 minute Surrender. Make it 5-10 minutes.
To honestly expect people to sit there for 20 minutes in a game that was over in the first 2 minutes is 100% what causes people to flame others.
I don't even need to add more to this post because its common sense. You expect people to wait and set up a game @ approx. 10 mins from que to game start. Then be force to play another 20 minutes minimum. You start taking a half an hour out of peoples lives and they are going to start getting angry. When 3/5 of your team have 5 deaths already at 5 minute mark its a joke to make them wait until the 20 minute mark. Honestly Riot is setting people up to be toxic so they can ban them, and have them start a new account raking in more and more money throwing out more and more bans. Riot is bad people.
EDIT: I keep seeing lots of downvotes and people flaming me for being a noob, but only 1 logical response to the post. GJ community, you are good at foruming.