The filmmakers and the crew put in a lot of effort into this movie. Creating the beautiful underwater shots, building those incredible sets, those cool-looking suits, and the creatures. All the underwater shots were believable and extremely well done
Kirstin Stewart does her best in the movie. But a combination of unwanted internal monologue and overexplaining how she's feeling ruins the performance.
There was no room or importance given for character development. By the time you get to know these characters, they're already dead or about to die.