Kennen's early game damage really needs a buff, his inability to duel is crippling

His early game damage is horrible, which makes him generally unviable, as games are usually over before he has time to scale into being useful.

i.e. in my last game, I was up 18 CS and one kill on Nasus. Around level 8, he and Rek'sai saw my jungle at bottom lane and decided to dive me from full health. As soon as Nasus took turret aggro, I kited him around it for 9 seconds before I finally died, and then they both walked away with Rek'sai around 60% health and Nasus around 30% health. I did virtually no damage to them, regardless of them eating my full ult and all of my abilities multiple times.

Please fix this so he can actually function with games ending around 20 minutes. Requiring AFK farm for 15-20 minutes just to become relevant does not work with the game in this state.