Why is Hanzo so crappy atm?

Let’s say you actually aim for Pharah or any character in the air, you hear that sweet PLINK sound just to see them fly away with 10 hp and get it back up in a jiffy. Why is Hanzo nerfed to oblivion because he could one shot people but Widow gets a buff and she is basicly the same. Her radius is even increased so she can pop your face off from even further away. It’s pretty much impossible to play him in ranked, it’s a shame that they are doing this to him.