Explain Kwang Nerf

Can someone please explain why they nerfed the crap out of Kwang?

His win rate is low, his K.D. is not out of proportion, he pick rate is low. He doesn't stand out or excell in any way really. So why did they nerf every single ability?

Is there some explanation I'm not seeing?

Compared to grux who is outstanding in basically every category...picked in every single competative league, good k.d. good win rate, why was he ignored and kwang was nerved?