Veigar grading seems way off
Hey there, I play Veigar a lot. And one thing I have noticed is that it's really really really hard to get a good grade with him. I've had games where I literally have 16 kills and 16 assists and still get maybe in the A range. I've had games where I never died and did really well and got in the B range. Ultimately it seems extremely hard to get a good grade with him and climb the mastery levels. This is really hard when I know that I am making plays, part of all the battles and getting a lot of kills.
To add insult to injury, I played Heimer randomly recently, did o-k but I knew I wasn't part of a lot of the plays or making the game. But then I get to the end of the game and I get an A!!!! It seems like there are champions that are just much easier to get an S on than others, and that can feel shitty. I might be one of the best in a game but then someone who did way less gets an S somehow.
I know some of the details of grading is exposed, but it seems like there is something I am missing about this. What am I supposed to do to push up my grade? 