How to fix ranked play!
Everyone has had matches where you have a 0/12 adc or jungler. Its bonkers. If a player is trying, they really shouldn't do THAT bad. I get it though, sometimes you get steam rolled or are having a bad day. Fine.
However, Riot could easily ban players from ranked matches if they do really bad for x amount of games within a given time frame.
Think about it. Why should players have to have a teammate who is playing so bad, that they are WAY outside of anything close to the average KDA for that champion? We shouldn't have to. Players who do absurdly bad too much make the game unfun. Its one thing to lose, its quite another to have never really had a chance.
There is no reason to let people are consistently playing horrendously to ruin ranked matches. They should receive a ban from ranked until they win say, 3 normal matches. Its not fair to the players to allow them to keep queuing up.
If they think ranked is a joke and don't care, this will make it very inconvenient for them to troll ranked matches.