Awful. Just dreadful. Honestly. It was so bad that I actually got angry.
It is entirely derivative. All the way through we were turning to each other and saying "Jurassic Park", "Raiders of the Lost Ark", "Godzilla", "LOTR", "Star Wars" etc
The acting (ha!) was terrible, the storyline farcical and the music... Dear God. The godawful rendition of Toto's Africa whilst flying over the Sahara (yes, a dessert in Aquaman) actually made me gag.
Beautiful visuals though, I'll give them that.