Here comes some hate and some spoilers:
It was as if the guys who typed this movie saw Batman Begins and took all the wrong lessons from it.
The original (1974) was terrifying because these kids were dropped into a nightmare with no beginning and no ending. This family existed out there before the film started, and give or take a sibling, was still there when the credits rolled. At least the 2003 remake, which I didn't like, got that part right. So this film was a bad idea from the get-go.
I do not need to see why the family became so messed up. But if you need to show me, do it well. I do not need to see how Leatherface (I cringed every time they called him "Tommy") makes his first mask. I can kind of figure that part out.
I do not need to see how Hoyt got the sheriff outfit. (And really, it was a better idea to think that he really WAS the sheriff out there.) They had him suiting up like Christian Bale in that thing. Stupid.
I do not need to see where he got the chiansaw from. Seriously. This isn't some sort of "where did the batsuit come from" level mystery. It's a farmhouse. There's a chainsaw there.
I do not need to see how Monty lost his legs. I do not need to see why Hoyt wears dentures. I never cared.
And I definitely think it was beyond idiotic to cram all those "origins" into one day.
If you ARE going to do an origin: A - make that origin interesting, rather than lazily go through a checklist of how each character ended up as they were in the '03 version; B - if you are going to go into new territory, why hamstring the "new" ideas by pinning them onto a tired-ass plot of "carload of hot young'uns get carved up?"
If you're going to show how it started, why not turn it on its ear a bit? Have a reverse-siege flick, where they close the plant, you spend a little more time on the "town dying" subplot, Leatherface kills his boss, and as a result, the entire town (what's left of it, including a sheriff dept made up of more than one guy) goes after the house? Picture NOTLD, or Assault on Precinct 13, or the end of Young Guns. The family has to defend the home, and in doing so wipe out most of the town's remaining residents. It would, in a MUCH more exciting way, explain the lack of cops and neighbors in the '03 remake.
You could have done this and kept all the "first time he uses the chainsaw", Monte losing his legs, Sgt Hulka losing his teeth, whatever. To me, villains holding off the good guys from their home base was the best part of Zombie's Devil's Rejects, but he's ripped off TCM films enough to call that one a push.
It'd be different enough from the TCM formula, would show the family bonding and coming together, fill the "bad ass" quotient for all the teen boys, would still qualify as a "massacre" for those who're hung up on that title. And who doesn't love a good siege flick? I think the movie gave itself a really low ceiling by insisting on cutting up more teens, as if there is anything left to be done with that formula.
And yet, the director's next project is the Friday the 13th remake.