Kayn is way over powered

At least Yasuo requires some setup before he can ult, a knock up. Kayn only has to breath in your general direction and he gets to ult you, which has no counter in the game, has an absurdly low cooldown and does ridiculous damage. As with all the other bloated champions, Kayn has full kit of CC and free damage. I really don't understand how the balance team could be so bad at their jobs. It's too obvious which champions need to be toned down, but for some reason, they just don't get it.