Don't you find it odd that Snyder seems to draw such criticism and discussion, even though he's not presently in the news. I mean, someone at the AV Club wrote the aforementioned piece, submitted to their editor and the editor decided it was worth publishing. The timing of it's release coinciding with the recent protest and tragedy in Charllottesville VA. Somehow, someway, this is Zack Snyder's fault.
One more time: Frank Miller created 300. Zack Snyder merely made a slavish, beat-for-beat adaptation of it. Every word, every image, every idea in the movie comes from Miller. The actual AV Club article makes that clear:
This wasn’t the first time someone so slavishly recreated one of Miller’s comics; Robert Rodriguez had done the same thing with Sin City in 2005, even giving Miller a co-directing credit. But 300 was even more striking in its fealty, partly because it’s a more sweeping, immersive cinematic vision and partly because it more closely mirrors Miller’s worldview. And Frank Miller happens to be fucking crazy.
Miller was a comics hero, the guy who’d turned Daredevil into a noir fever dream and helped inaugurate a new era of grimly sophisticated storytelling with 1986’s The Dark Knight Returns. Once upon a time, the darkness and misanthropy of his work made him a fascinating, transformative figure. These days, every time he writes a bitterly disgusted blog post about Occupy Wall Street or whatever, it becomes increasingly obvious that the darkness isn’t a put-on. He really lives it: He really is a paranoid reactionary with an active imagination. That helped produce some great art, and it also led him to tell the nakedly fascistic story he told in 300, a story that became all the more jarring when Snyder rendered it as blockbuster entertainment.
Despite the headline, it's overtly the opinion of the article's writer that Miller is the main one responsible for the film's problematical attitudes, and Snyder's culpability lies mainly in deeming Miller's work worthy of faithful emulation, and in making a film so visually striking that it vastly increased the exposure of Miller's fascistic work. If Miller is the "Hitler" in this analogy, Snyder is merely the Leni Riefenstahl. Or the D.W. Griffith -- the article specifically likens 300 to The Birth of a Nation, a superbly made film popularizing a toxic ideology. So your assumption that this is some kind of personal vendetta against Snyder specifically is badly off the mark.