Why Riot should leave zed alone( no nerf or buff)

I heard people complaining about zed and his early game, then how about cassiopeia who has a frightening late game and how about jax. Zed's early to mid game is when he shines and if he gets nerfed early game and does nothing early game his already not so good late game scaling would be worse because he would have few kills and golds and items.

Maybe it is a trend to nerf assassins. People think their damage is op. Well, read the definition of assassin. They don't have consistent damage. They need burst damage after looking for chance. Zed is not like garen or darius or master yi. He has long ultimate cooldown and he needs to wait for a chance to use his ultimate at right time and burst enemies early game to be more useful late game. By the way, he already has so many counters late game like qss or zhonyas. So, that is why zed doesn't need nerf early game. If this trend of nerfing assassin continues like what happened to talon, they are gonna be bad. They do not have CONSISTENT DAMAGE LIKE DARIUS OR GAREN!!!!!!!!!

IF U R GONNA NERF HIS EARLY GAME, BUFF HIS LATE GAME OR SOMETHING!