The script is unbelievably weak. The dialogue is just plain awkward and doesn't hang together. I'm guessing a TV exec's teenage kid wanted a crack at writing.
I'm guessing it's supposed to be grimly funny, but it's way off the mark. Where do you start? There are so many disparate strands. One scene: Whoops, the vicar's son has child porn on a data stick, so it goes into kind of physical comedy with the vicar's dad chasing his son's tutor to get the data stick off her - a kind of wisecracking Tom and Jerry chase.
Good grief... scene by scene, storyline by storyline it's beyond awful.