The stupidest revenge movie I have ever had the misfortune of watching.
Dad came off as more psychotic than grieving. Mom's character was drawn about as convincingly as the drapery, given she also lost a kid (seriously: they should have just killed her with the kid and made his weirdo Unabomber thing more understandable). The 'training' in the lead up to all the retribution action was laborious/long yet deeply shallow (cool: he can do some more pull ups!). The poor marksmanship of the bad guys tested incredulity even when prepared for it as it is such a given in these films. And the actor's facial expression is set to "I smell a really bad fart" for the whole film.