Can we do something about autofill?

Got autofilled once, played the game, then I got 2 games in a row where I didn't get to play the champ I wanted. One was a remake, and in another my teammate banned the champ I was hovering, and now after those 2 games I am autofilled support again. I don't want to play support, please stop forcing me to play it every 2 games.