Rating System Rant and Questions.

Not sure where else to put this so I'm just dropping it into meme's and Games... now I know how the rating system works to a point, or at least I thought I did, but this game has thrown everything I know about the rating system out the window... Now I didnt do the most damage in the game, in fact the Ziggs with an S- out damaged me by more than double my damage, however he's ziggs, was fed, and does nothing but aoe damage. All of that aside I did more damage than anyone else in the game, never died, took the most damage in the game, had 106 cs, was 12 kills and 5 assists and after 23 mins and 37 secondsish of playing I got an S... now Ive gotten an S+ on lee sin before but this feels a little bit like robbery. I REALLY think the rating system needs to be fixed. I dont want to go out and farm for 30 mins and have basically perfect farm as a jungler and do nothing to help my team JUST so I can get an S+ rating. Farming IS important dont get me wrong, but its not SO important that I should sacrifice helping my team as a jungler JUST to afk farm in my jungle. Bear in mind that this is a Bronze 2 ELO game, and Im fairly confident that I wasnt being compared to plat/gold elo players, because thats what it feels like in this situation. I just think that Riot should fix the way the rating system works a bit. How much farm you have at the end of the game shouldnt determine how good you are at the game as a whole. I saw a Cho'Gath with 507 CS in a 45 minute game on time, and he was 0-8-3... and we lost the game because he was just afk farming away. anyway, Thoughts?