Who thought auto fill was a good idea

Ok so I don't like auto fill, however I also don't mind being filled to another role, but when my teammate in a ranked game gets auto filled to a role they don't play and feed and suck then i have a problem with it, in lower elo the queue times aren't long to begin with, i understand in the higher elos where the players understand the game, but when I'm literally telling 3 of the 4 other people what to build on their champs because they don't play that role, then I have an issue. It gives me a negative experience with the game, and it makes me unable to climb because I do have to baby every low tier person. Honestly it's annoying and i wanna quit and go to overwatch because every player is either not trying or can't play at their peak. Thanks Rito.