Heart of Darkness with 5 female soldier/scientists, in Roadside Picnic crossed with Chaga, ending in Alien and 2001. I haven't read the books yet, I like some of Vandermeer's stories & anthologies, but the film really does feel like pastiche. Some of that is the director making a "subjective" adaptation.
The characters are wafer-thin, even Lena (Natalie Portman) and husband Kane who are closest to being people. I love Jennifer Jason Leigh from being Allegra Geller in eXistenZ, but as Dr Ventress there's nothing there.
Most of it is walking-in-woods scenes like any no-budget B movie. Possibly the weirdest part is it's supposed to be Florida… But they filmed it in England, and the plants and just the atmosphere are wrong. Which to some extent doesn't matter, since the area's "alien", but it's the wrong thing that's wrong.
The three "monsters" are… fine, really not that weird, the first one is like one of those terrible Jaws-ripoff flicks, the last one is literally just one of those creepy spandex bodysuits after some CGI bullshit. One monster scene is good (the chairs), the rest needed help from a horror director.
I'm disappointed, but none of it was terrible, just mediocre pastiche of better stories and movies. I expect people who aren't well-read think it's amazing.