Sometimes the grade system surprises me.

http://matchhistory.euw.leagueoflegends.com/en/#match-details/EUW1/3136728026/36603236?tab=overview

18/1/26 on malphite. When the game ended, I was like "pretty sure I deserve an S+".

Never been so wrong, with a meager S. (Still granted me level 7 Malphite, though, which I'm grateful for.)

I know KDA isn't everything, but c'mon. I was obviously the carry in this game. All other players died much more often, got less kills and assists, I had nearly the highest farm (3 less than both adc's) and no one came even close in terms of damage dealt to champions. I feel like the grading system is skewed towards splitpushing over skirmishing/teamfighting. In this game I HAD TO stick with my team cause otherwise they'd get engaged on and died instantly.