How stupidly over powered is Kennen!!

I played probably 10 or 15 games with a kennen on my or enemy team in the last week. Each game the Kennen won it by himself, because this champion is so stupidly powerful. I would love to see him nerfed to the ground but even then......he will still be solo-carrying games. I want your oppinion on this damn champ. Is he balanced or not?
Report as:
Offensive Spam Harassment Incorrect Board