I'm tempted to check out Aquaman now. What's so bad about it? Plot? Acting?
Thoughts I’d add my 2p.
First, as a more minor and less fatal issue....crap superhero? Unless you are really into this genre the name of the film will immediately set your disbelief dial to 11. Aquaman. Aqua-man. He’s from the sea!!!!!
The we have I think Nicole Kidman in one of the most plastic roles ever, in all senses. Sticks out like a sore thumb.
A more major flaw for me (by superhero standards) is the completely jarring switch of tone. It starts out played quite straight. Once act 2 begins, it all becomes a bit silly and more jovial, at the point when the stakes are raised. I’m not sure whether the serious bits are too serious or the silly bits were too silly.
As with any superhero film, it’s way, way, way, way, way too long. Obnoxiously so. There is no need for these films to be so long!!!
Lastly, a lot of people didn’t like the ridiculous visuals, but they delighted me with their absurdity, particularly the climax of the film.
In summary then, a film which requires an enormous amount of disbelief to begin with blows it by having a mixed tone and being too long.