Loosing in Champ Select
I plat mostly in plat ranked now. Picks area still a substantial dependent variable in game outcome. Like a burst/poke/whatever team going into a team with a solid front line. Or a team with no CC into dive champs. If you're not jungle or not last pick, there's no way to carry or balance your team.
I wish this game had better options for dealing with the team comp variants you might encounter.