Lazy writing. Characters with muddled motivations. Things that don't make any sense (brainwashing hair goo? Really? Flickering lights to show "something is off" but is just a cheap trope, a character gets hit by a car but is up and fine the next day, a missing character who just shows up at the same place/time another character is about to be brainwashed... I could go on and on.
There might have been a good story here but this was just a total waste of time. Terrible and trite.