Champions grade system

http://imgur.com/a/At5WJ http://imgur.com/a/PgWjz#l6tMd9G Your system to grade champions is so bugged you get B grade if you have kills you still get B grade if you have most assists in the entire team , you have b grade if you are highest dmg.Supports have no chance at all.I ve seen people with low dmg but with a lot of ks to take S grade for nothing.You system need hard rework its ridicolous.Work on it , test it , see on yourself.Where is explained how it works ?I have better idea , just remove it , its ridicolous too see someone rank 7 because he took tokens and he doesnt have clue how to play his champ...