Annihilation, crazy is as crazy does.
At the very outset, Annihilation does not know what to do with itself.
It’s all over the place, but that’s not the beginning/end of it. It really doesn’t have a reason to exist!
The movie seems to be have been made with the express purpose to shock and awe the audience.
But the audience needs a reason (or more) to be shocked and in awe.
That’s something that seems to have completely escaped the makers of Annihilation.
Even Natalie Portman isn’t reason enough to sit through this unmitigated mess.
PS: I haven’t read the book/s. But I don’t think anyone would want to watch/read something that doesn’t explain the reason why.