Ok so it's Netflix slop and it shows in the third act, but the journey is generally enjoyable and has a lot of good pigs being pathetic.
spoiler
That’s really the genre Saulnier lands on here, complete with a moral clarity about its violence—Terry doesn’t kill, for reasons not precisely stated but perfectly in keeping with his background as well as his pragmatism—that might strike some as insufficiently radical, especially for a filmmaker who has knowingly flirted with exploitation-movie righteousness
Personally I wanted at least a few of the pigs to die, though there's definitely some fun wounding/injuring. I wonder if some of the tameness is due to the Netflix slop machine.
Still, I think even if the ending is a bit disappointing, the journey makes it clear how corrupt the pigs are and how irredeemable they are.
In short 
haven't seen it yet but it's directed by the guy who made Green Room and Blue Ruin, both of which are pretty great. I'm planning on watching it later tonight