Champion Grading broken
TL;DR: Playing "unconventional" supports will never give you an S for your score, and you won't get hextech boxes off of your games. Period.
Background on me for this post: Silver 4 Support main Play's "fake" supports unless in groups
I play a lot of champions as support when they aren't meant to be (

).
I know that's... almost every champ, but it's all based on how cocky I'm feeling, or who I'm playing with.
That aside, I played a game with Brand, one of my current favorite champs. I went 7/2/3, had 29 farm, and they FF'd at 20:49 (we were stomping). That's a damn good score IMO. Usually I only see smurfs or mains get those kinds of scores. I'm thinking maybe I get an S- at bare minimum, right? I mean, I'm support, and I took place in 10/18 kills on my team (like 3 of them were solo kills). I warded, and stopped ganks. I even did flashy plays to get them when they were running, and were far under tower. I feel like this was one of the few times support carried really hard. The issue is... Riot gave me an A+. I was rekt by that. It came to mind that this happens often. When I play a support that is usually a solo laner (Brand, Ryze, Anivia, idfk), no matter how good my score is, I can't get any form of S because I'm not taking farm.
Now I know I'm not the only one who is having this issue. I played a game with a friend. They played Kat mid. They went something dumb like 20/3 or something Kat like, and got an A-. I understand it's based on personal skill(me)+general skill(everyone who plays that champ)/blah blah blah math. But for real, if I'm playing support and I do well, I just want my S so I can get my boxes for hextech crafting!