Getting S with Janna is becoming too hard (at least in aram)

(Sorry for the image cropped, i took the screenshot using puu.sh and i had to hover mouse over the champion image to reveal the grade i got)

http://i.imgur.com/W4HenuU.png

I Even applied 11 Very-Hard CC and got 18 assists and yet i didn't made it? Main Janna players must be lcs players!

And if you ask, i bought because is the true Core of Janna, otherwise it wouldnt be called Runaan's Hurricane.