My score was objective better then kayns, as well as gold and damage. I was only down CS from him, yet he got an S- and I got A+. I don't understand how they have set this system up, but I've gotta admit. I'm fucking pissed.
EDIT: I changed the errors in my ways. Vision is key it turns out. https://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/3075799956/217845948?tab=overview
Cind3rkick2 votes110 cs at nearly 30 mins, and kayn doing double the damage to objectives
Timethief492 votesYeah you were down in cs vs kayn, vs JUNGLE KAYN. Your cs as laner should be close to 10 cs/min. Yours is more close to 3 or 4.
Baron Barian1 votesThere's more to a good score than just KDA. I'm sure everyone has said this twice,
ShadowScorpionX1 votes10cs/min is unrealistic except in the higher levels (think diamond+). At silver/gold elo I tend to average 7-8 and am the highest on the team. given the CS in this game, I'd say this is around the bronze 3/2 level. you did good, just focus on CS in addition to kills
Kai Guy1 votesEven 1 or 2 
might help bump your vision score up. Your probably overvaluing KDA and Damage.
iiGazeii1 votesYour score is based on your champion, not compared to your teammates. An S on Kayn is not the same stats as an S on Tahm.
Usually, what prevents people from getting that S is CS and vision. Damage and kills is not the only factor. Vision control, objective control, farming, and teamfight presence all matter as well.
