How Did I Not Get S?

Because you have 73 CS on a 26 minute game when the average for a jungler in that time is about 130?

probably your CS

There's literally an almost identical thread to this one that was posted three minutes ago. How do so many people not know how to use the search bar?

Same stuff has been happening when I play adc twitch. I can get the most kills/farm/damage and get an A- and it makes no sense honestly if I'm being put next to people who are challenger playing twitch when it comes to the grading system.

Getting an S is also based off of wards placed, destroyed, objective control, and kill participation? Did you lack these?

YOu need to place more wards, get more CS, etc.

Grades are based on the champion, not the general KDA. You did better than about 90-ish % of Rengar players.

I've been playing really defensivly when it comes to warding and being aggressive when it comes to cs/kills. I'd post a video but I don't have access to it right now but I do believe I'm using my trinket off CD almost all the time when I'm playing. And as I said in my first comment I'm getting the most kills which means I have a high kill participation%

I placed tons of wards helped rift helped baron and took towers

I wasn't jungle LOL

Smurfs.