I wish I could hate King but I don't sense malicious intent from him specifically. He has some awful execution in my opinion, but he can really dial in on some great stuff occasionally.
I think Seeley was a great partner to help refine his ideas and get better material out of him. Perhaps with a stronger editor that the upper brass actually empowers over King, he can really shine.
With proper support, you get Grayson. Else it's Heroes in Crisis. He's a monkey's paw half the time, so who knows.
I really don't hold any personal grudge against him despite how he's attacked two of my favorite characters (Dick, Wally). I just really hope he recognizes the holes in his game and works on shoring them up.