Please understand the importance of CS over Kills.
I cannot fathom this enough, I just played a game against a Katarina with the score of 8/14 who would tower dive the enemy opponent over and over again, with a final CS score of 107. Not only did she 1v5 repeatedly, but she had the audacity to blame me for "afk farming", a.k.a, preventing the enemy team from pushing our towers in, while poking them down. I on the other hand had a final score of 3/3, the only deaths were based on Kat feeding 8 kills to Rengar, so I'd just get one shot, and had a CS score of 169.
Here's the funny thing, even though Kat had 5 kills on me, we still had a almost dead even gold count, hers being 8,512 and mine being 8,537, only because I know that the game isn't based around KDA. Please get this through your thick skulls, no one cares about your KDA at all, no one looks at it, all they look at is if you win or lose. LP isn't determined off of your 30/0 score, taken it would be easier to win if you did have that.