Tom King's infection has spread to the rest of the DC host's body...
You could very well say the same thing about Scott Snyder. Overblown hyperbole.
So I don't really keep up with the buzz, but do people generally not like Tom King? The only things I've read from him are Mister Miracle and The Omega Men, and I've loved 'em both.
As a big fan of Tom King, I can say that some of the criticisms lobbed at him aren't without warrant. But like my comment above, much of it is overblown hyperbole.
In re-reading the "I Am..." trilogy without the interruptions, it's a much more rewarding read, and "The War of Jokes & Riddles" is pretty solid, too.
"Rooftops" is one of my favorite short arcs, as is "The Brave & The Mold". I think King writes a rock solid Swamp Thing. Anything directly involving the engagement/wedding of Batman and Catwoman has been solid as well. The Elmer Fudd/Batman crossover book had no right to be as great as it was. The "Superfriends" arc was solid on the Superman half. The Wonder Woman half was decent (but the criticism was again overblown).
The only arc of King's that I genuinely did not like was the Booster Gold arc that just finished up. And even then, it's not because of King's treatment of Booster Gold (which didn't make much sense regardless), but the story lacks context for all of the action therein. We don't know why Booster did what he did, we don't know why Booster was acting the way he did. We don't get any info. You can certainly extrapolate, but if it's not in the story, it doesn't count. Honestly, it felt like a filler story just to nudge the book closer to issue 50 for the wedding.
His Batman run is uneven. The first half of his run is interspersed with editorially mandated crossovers and what I can only assume are fill-in stories to accommodate time needed for his main artists. The second half is just interspersed with one-shot stories that don't really tie into the larger narrative, but again, I think this is to provide extra time to his main artists.
If you've read his other work, then you're familiar with his writing style. He has a rhythmic staccato style of writing that is very distinct. Granted, this style isn't for everyone. But it works for me and I understand the desired effect. The closest I can compare it to is early-Bendis (see: Daredevil), and with that, he's writing Batman. He's not a character who should be monologuing our ears off, which is why I couldn't stand Scott Snyder's run at all. King's Batman run is also very intimate. His stories aren't about Batman planting explosives on the moon to prevent alien invasions. King's stories are about the fallout, the personal consequences.
Again, not everyone likes it. That's to be expected. But the vitriol(often spewed by people who seem to only buy the book just to hate it, which makes no sense to me) is overblown in my opinion. It's worth checking out and forming your own opinion.