It's just... really bad.

Rating: 4/10 (5 January 2019)

I am a fan of MCU & DCEU who favors DC comics (not movies) over Marvel. But let's be real: This movie is objectively bad. The visuals are pretty neat, Momoa is likeable and Manta with his suit is pretty sweet. This however cannot outweigh the ATROCIOUS writing, poor directing, bad directing and poor acting.
One thing at a time: the writing is so lazy, there is no explanation of character relationships (specifically Willem Dafoe & Momoa), the lore is hastly given, and the super hero cliches are bad. This is all on top of THE WORST written script I have ever experienced. Every line of dialogue explained everything that was going on very blatantly. That's not how dialogue works! Additionally there was absolutely zero character development.
Basically everyone outside of Momoa and Herd should be replaced in this movie. The movie was littered with actors who stood out like a sore thumb. Herd was pretty bad too but I have a little faith.
In essence the movie is reminiscent of Green Lantern: neat visuals, likeable leading actors and a cool, promising secondary villain, and an overall trainwreck.