Aquaman is terrible.
The jokes don’t land. The close-ups and metal riffing on the little quips are so pathetic they’re laughable. The heroic arc is completely lacking, with everybody telling us how worthy Aquaman is without the movie demonstrating any (other than ‘genetic’) nobility on his part. It’s about 45 minutes longer than it has any right or reason to be. The soundtrack is confused, sometimes trying to be dramatic and sometimes trying to be funky. It’s as if they wanted to emulate both Infinity War and Guardians of the Galaxy all at once. It even starts very abruptly, with no attempt at any character building. Things start happening to people that you have absolutely no reason to care about at all.
If you want a superhero fix until Captain Marvel and Avengers: Endgame come along, do yourself a favor and watch Spider-Verse instead. It’s a far superior movie.