Prometheus wasn't
that bad. It was disappointing for sure, but there have been worse movies associated with the Xenomorph.
Dunno about you but in my case Prometheus is a top notch material.
Then again, I'm a person who wouldn't go ask a god to make me immortal, sorry, I don't think that death is a bad thing, in fact I find it superb "design". That's of course just me, modern Hollywood is all about plastics, keeping good looks and reaching immortality, and if anything this movie (just like Verhoeven's bugs that kill "perfect" looking people) criticizes it heavily.
Prometheus' main topic, pouring $ into searching for immortality while there are other things out there more important, won't die with this movie.
Beside that it's another title trying to address our possible attitude(s) towards AI and androids.
As such this movie just can't be accepted widely. People will go watch fairy tales where immortality and fountains of youth are "normal" and where AI is like in mainstream games - nonchallenging, easy to kill, and is just used as a sort for making modern slavery possible. But should movies, all movies, be "they all lived happily after"? Shouldn't movies be used as old greek theatre - to question and criticize the society and politics?
Most of my friends think of "the abortion" as the weakest part of Prometheus, unbelievable, outrageous or something. Sorry, it's sci fi and sci fi movies *need* such stuff.
The movie's fatal flaw is no ending. It's still not disappointing it's just not done well. Not sure if it was the bad script not possible to fix later or Cameron's attention got loose.
I loved the movie and just can't wait for Prometheus 2.
If you've had enough of Hollywood's "values", I can't recommend Prometheus enough. It won't change your attitude, but you'll be able to see some things from a perspective different from modern Hollywood.
If you don't want to watch movies that explore stuff in a way you don't expect, I suggest renting any Rambo or better yet, some American Ninja sequel.