I'm rewatching Texas Chainsaw Massacre: The Beginning right now. I don't think it's as bad as most people say it is. It certainly lacks suspense, but I find the overall story to be more in line with the 1974 original. The whole cannibalism aspect wasn't glossed over or ignored like in the remake, but was a central and integral part of the story.
There are a couple of plot points/scenes I thought didn't make sense. First, during the escape attempt, as the blonde girl was driving off in the tow truck several shots clearly showed that no one was near the truck. Then Leatherface pops up out of nowhere and stabs her through the shoulder with a meat hook. Did he develop Jason's teleporting ability from Jason Takes Manhatten?
The second thing that made little sense was the biker that the brunette flagged down for help. Earlier in the movie he had a whole biker gang with him. Then when the brunette is looking for help he's all alone? Biker gangs think of their fellow gang members as family. The whole gang would have been out looking for their missing member, not just her boyfriend. I understand why the film makers chose not to do that. An entire biker gang vs Leatherface & Sheriff Hoyt? Would've been a really short movie then. But even if the biker had gone looking alone, certainly his fellow gang members would have found his abandoned bike by the highway and made their way to the farmhouse.
And to top it all off, Leatherface hiding in the back seat of the car at the very end. Another Jason Takes Manhatten scene, as there was no way he could have known that the girl was planning on taking the slaughterhouse manager's car, or beat her to the car even if he did. And how did she not hear the chainsaw's motor idling in the back seat? He didn't pull the cord to start it up, thus the engine had to have been running as he was laying in wait.
So not an entirely horrible movie, but it certainly could have been better.