When it comes to autofill you have two options.
Play 5 games of normals in roles that you don't understand on incredibly basic champions for the role (E.G.
), then work on some extra backup picks just in case on of your simple champions are banned.
or
You could incessantly bitch about it on the boards and never improve but lose a bunch of ranked games.
Okay cool. you guys can refuse to try and win more games.