Could we please fix what it takes to get and S?

Ok, I have been trying to get my other S game as Kindred JG in order to get the upper level masteries. I just played a game where I went 15/2/7, soloed 3 dragons, took rift herald, and took barron. The link to the match history is here and on the post itself. Can we please get this fixed b/c I have had many games like this and I can only seem to get S ranks as a jungler if I completely stomp the enemy team single handedly and don't die at all.