Leatherface aka Jackson/Jeb throughout the beginning of the movie and through the middle seems to be a normal caring guy who talks and knows right from wrong. But then as soon as Bub dies he just instantly turns batshit insane smacking his head and going full on psycho.

Then after being shot, all at once he turns into a mute hunchback walking chainsaw wielding maniac willing to kill anyone, the girl he cared so much about the entire movie he just cuts her head off. He just went from point A to point Z in like 20 minutes as a character.

It just didn't make sense to me and the backstory didn't match up at all to the Leatherface we see in the 1974 movie. In that movie Leatherface is clearly a mentally challenged psycho with the mind of a child almost. Yet in this movie throughout the film he's a normal acting a teenager.

I know he gets shot in the face near the end and his friend died but i just didn't buy that instant transformation into Leatherface that damn fast after seeing him as this normal guy the last hour of the movie.

Now the fat retarded mute Bub, THATS how you'd picture Leatherface from the 1974 movie being as a teenager. Not that skinny handsome caring dude we saw through the whole movie.