Why did revert Lulu nerf?

Why did revert Lulu nerfs?

Riot gives nerfs to competitive but reverted.

We see Lulu every game.

I didn't say that ''Lulu deserved nerfs.''

But what was Viktor's fault? What was Ryze's fault? Gp's fault etc.

Riot said nerf to competitive but this Lulu nerf isn't enough.If for competitive.

Lulu vs x champion every game or Corki vs x champion.

65% pick/b rate and this nerf? Failfish.