Again, all of that nonsense is one two-minute scene of the three-hour film! All of the changes don't simply undermine the narrative weight and meaning of the comic, they work against narrative strength of the film. Let's talk about the squid. Many praised the change in the film that has Ozymandias frame Doctor Manhattan as the enemy of the world rather than a race of psychic alien brain squids, but they forget that the impending doom and arrival of the squid is laid into the comic as early as the first issue. In the comic, Ozymandias kills the Comedian because the latter uncovers his plan to save the world; the Comedian is later revealed to have done this by infiltrating an uncharted island on governmental orders, suspecting a communist plot. When the Comedian arrives on the island, he finds a community of artists, writers and scientists creating an entire alien race, planet and culture. How did this happen in the film? How did the Comedian uncover Ozymandias' plot? It's never explained, he just did because the plot says so. Therein lays the major problem of Watchmen; it is not simply a bad adaptation, it is, whole cloth, a bad film. Poorly paced, oddly edited and leaning heavily on a visual style that is not as unique or interesting as it purports to be.
Zach Snyder is, as I've said before, a brilliant visual director and cinematographer. He's ideally suited to direct adaptations of visually-driven source material, which is why the film version of 300 works so well; both Snyder and Miller are image-focused and often work with the hyermasculine. Snyder is not suited for something like Watchmen, a narrative and metatext-dense deconstruction of traditional superhero tropes set against a backdrop of Cold War paranoia, the commodification of the punk ethos and a burgeoning queer sexual revolution. Did you honestly get any of those themes from the film? I rarely say this about any film, as I believe that something redeemable can be found in almost every production, but I hate Watchmen. Honestly hate it. It may not be as "bad" as Catwoman, Super Buddies or Zoom, but none of those left me literally yelling at the screen in frustration as the entire point of the narrative was steamrolled over to get more action and blue penis on screen. I never want to watch a second of this again.