FYI: Lee Sin "Mains"

IF you have a 36% win rate after 50 or so games, you don't main him. You intentionally lose games because you want to learn a champion in ranked. For that matter, I honestly think that we should ban people from playing champions in ranked if they have less than 40% winrate until they play them in normals with a 50% or better winrate (10 games minimum).