I think it way too easy to dismiss those who had trouble with the movie like that especially the ALIEN and yurtoodumbtogetit arguments. Of course i'm not talking about the haters or average joes who need a movie to go BOOM BOOM BOOM every 10 minutes ^^
I've had two disappointment with the movie.
First, it was basically a remake of ALIEN bigger and louder, using a lot of the ALIEN original script unused ideas and concepts.
But i'm biased because they are great ideas for the ALIEN universe that I've known for years so they were not fresh for me but probably for someone who never read them.
Then the Engineer angle was not as well used as in the scripts where its pretty smart especially the whole terraformation tech wich is one of the main drive for for Weyland corp, even if i definitely like Weylands quest for eternity wich gives the movie a neat religious/mythological theme but both motivations could have been used making the movie even smarter.
But yeah even if the movie has its flaws its doesnt deserve to be hated
My main issue with the film is that they completely retconned what was original planned to be a direct prequel to Alien. If you have legitimate constructive criticism of the film have at it and I respect it. But most film viewers are stupid and immediately dismiss it.