Hmm I don't mind depressing films if they are engaging but it's tough to be drawn into a 'philosophical tragedy' that is, ultimately, dull due the lack of likeable characters and wafer thin plot (let alone lack of 'fun'). How it was padded to 2 hours 30 I'll never know.
If I was to ignore how it followed up the plot of Aliens in entirety I might increase my score up to a 4... but ultimately it's 3, sorry
For reference, I'd give Prometheus a 5.5/10 (same as covenant).
Seems this series has far more misses than hits now....
You are entirely ignoring the tension of the impeding arrival of "the company" who in many ways eclipse the alien for sheer evil.
I agree from killing two surviving main characters from aliens via the credits to reducing most of the action back to alien pacing it is a misfire, technically if it was a standalone film I'd be a fan, as a continuation of Aliens it doesn't work overall for me.