Hi, bit late to the party.
At first I was disappointed with the movie.
I was expecting an proper Alien prequel or at least something less vague.
But over the years I've come to love it.
Thing is, I think you have to be a more than average movie lover, willing to put the time into research(The minimum being googling for answer, the max I don't know. Maybe registering to this forum
) and there's always the matter of personal taste.
I got a certain interest in mythology, archaeology and exploration. I love animal/nature documentaries.
Since Earth has been entirely mapped and science explains almost everything, the exploration of unknown, even if fictional, worlds interests me.
And I like reading up on subjects that I like. If I really like a band, I watch their documentary and read their books.
In the case of the movie, reading the script, seeing concept art and knowing what could've been,...
Overal, I'm glad this movie got made. But I can totally understand if people don't like it.