Fixing unfair LP loss

Today I lost a game 14 minutes in due to it being a 3v5. Our support was toxic and our top left for no apparent reason. I thought: "why should the 3 players on my team trying to climb the ol' ladder be punished for the actions of two lousy people." Sometimes it may just be one toxic, afk, or troll player than can ruin the entire experience for their team mates. There needs to be a way to have a vote at least 10 minutes in that would dissalow LP loss or placement X's due to one of these unfortunate events. A way to where people that put tons of time and money into this game are actually rewarded for being honorable players. It doesn't happen to everyone, but others, like myself, see this at least once or twice a day, which can make a huge difference in winning and losing. I hate winning the "freelo" games where the enemy team got screwed almost as much as being on the team with that joker. The system of banning people also needs to be fixed. In Tylerone's case, bannig doesn't stop him from creating an account, and he is right: Riot doesn't care if he plays, just as long as he doesn't stream it for his huge fan base. There should be a seperate tribunal that can vote whether or not a toxic player should be placed in their own environment of toxic players. This would allow the seperation of good and bad players. There would be soloque for both types of people, but it would be fixed so that we can finally play without worrying if this guy is going to call me a fa* and build 6 tears of the goddesses. There would be a ranked server for those punished, and a ranked server for those that follow the summiner's code. Too many people are being screwed by players that get off by being toxic, and it needs to stop. I would love for Riot to read this and take from it what they will. I think my ideas might be someone similar to what others already had, so I apologize if this seems copy and pasted. Thanks for taking time to read through, have a nice night, and take it easy on the Rift!