Nothing tilts me harder than someone playing in a way that is intentionally bad because they think losing with AD top Bard is "fun," and then telling everyone to relax because it's just a normal.
I queued into the game because I have some objective I am hoping to accomplish. Maybe I want my first win bonus, or maybe I am trying to get a mastery token. I did not queue into the game to wander around the map pointlessly, with no hope of earning my token, and no hope of getting my win bonus, and no way of getting the stupid team to just end the game with a forfeit because they're heroes who never surrender. Since I am punished for leaving, I am basically this player's hostage for half an hour.
I don't expect everyone to play their main, or even their main role in every normal game. But I expect people to try. If you want to have "fun" breaking the meta by trying to jungle with Veigar, have it in a custom game with your friends.