Inarguably, this should have been S+
To clarify, I am not complaining. I got to wreck as Volibear in my most satisfying game in awhile. But I am trying to make sense of what seems to be a nonsense system.
In this game, I went 21/6/13. That's around 75% kill participation. I got multiple double and triple kills, and was even legendary for a brief time. I was present for two dragons and multiple turrets. I even got my sweeper trinket.
How could anybody argue that this game only warrants an S rank? If ranks are indeed based on the average for people playing that champion, then I shudder to think what kind of scores the best Volibear players are getting. 30/1/20?