I just came back from the cinema having seen the movie as promised. It did have a couple glaring flaws IMO but otherwise it was solid, enjoyable etc. It's not anywhere on par with say, The Prestige, but it's better than Oppenheimer, Interstellar and other recent films by him.
To start with what I liked, I think the cinematography, score and mood were excellent. The Cyclops, Circe and Siren scenes were impressive and have a lot of charm from a filmmaking perspective. The monsters are a highlight of the movie. The same is true for the last part with Odysseus coming home as a beggar, his dog recognizing him and all that.
At its core it's a film about war PTSD even though it's handled indirectly, but Odysseus being literally chased by the dead and getting "addicted" to a flower that wipes his memories is a decent portrayal. It also preserves a Greek "spirit" by focusing on Odysseus' virtues and all of the shit about war and vices destroying their culture.
That said I felt like it was horribly miscast. Not in the way you think, the politisperging around the movie is completely irrelevant to the content. Ellen Page and the negress had maybe 5 minutes of screentime combined, though seeing the former waddle around at the start was kinda funny. Some people here claim that Sinon is the equivalent of Achilles. That's bullshit. It's a pretty big plot point that when Odysseus gets back in disguise he uses Sinon's name for himself, because Sinon is just a rando who died to most people. I think Tom Holland playing Telemachus was the bigger casting oopsie. He's a capeshit actor who's not suited for a movie like this and most of the scenes focusing on him feel bland.
Some of the social scenes were quite poorly done. The dialogue spelled out too much at times and the acting was too "generic Hollywood movie". It's noticeable with Calypso and some of the early Ithaca scenes, not as much with Odysseus and his crew. The Scylla scene felt very rushed like they were trying to cram it in but you barely got a good look at it. Otherwise the movie is pretty well done.