Film criticism (or any criticism really) has to come from a place of at least serious consideration. I like it or I don't like it - not really a value add to a movie discussion but also not objectionable. You say Prey is a movie you don't like? Fine I have no issue with that. Enjoyment is 100% a matter of taste and there are a lot of reasons why a movie may fall flat for an individual that isn't necessarily a problem with the film itself. An example I'll give is the Lighthouse. That is a movie that I have so much respect for everything that went into it - the acting, the dialogue, the directing, the story, the cinematography - but the movie 100% falls flat for me on a base "did I enjoy this" level. I recognize it's not a fault of the movie and importantly it's not a fault with me. I just didn't like it and that's fine. I can still appreciate the craft that went into making it, though.
But if you're talking about something to do with the craft of filming - be it pacing, cinematography, sound design, whatever - I require a bit more meat than "it was slow." This is especially true because the movie is like 91 minutes long and *very* tightly plotted. There's not a B-story in this movie. So what is it about the A story that is slow to you?
It's pacing is probably its biggest strength in an era where every sequel or franchise film seems to be upping the stakes to absurd levels (be it destruction of a city, country, world, universe, or indeed multiverse).* This story was about one person surviving. It establishes how she uses her skills and knowledge and abilities to defeat a more fearsome foe. For every "slow moment", it is something that is later paid off. Without getting into spoilers I can't think of a single frame of this movie that doesn't directly serve the overall story - from her knowledge of herbs to her knowledge of her landscape to how she solves problems (in a way that is at odds with how most of her tribe views them). And that f***ing rocks.
*side note: Maybe my favorite thing about EEAAO is how it turns this expectation on its head by appearing at first to be about something with insanely high stakes but was actually about the relationship of a mother and daughter