Was just dumb.
All this sub-storying that didnt really resolve.
The characters never achieved a depth. You never really understood why they were interacting with each other.
If Leanne had the foresight to dig carpet fibers into her nails for forensic evidence post-death, why not use some of that chutzpah to drag yourself out of the trailer?

They basically hooked an audience before the show started with that tantalizing nanosecond disappearance by the flower truck in the previews. Over and over again, we see her, we see the truck go by, we see her gone. I know I was intrigued to see the great story that would explain that.

No such luck. What we learn in the finale about her death, couldnt even have fit into that microsecond that it was supposed to have happened in.
Why did HBO bank on a 5 episode drama that was inferior even to the worst of regular American crime dramas that squeeze these sorts of stories into an hour.
The ONE thing that was an indirect hit for me, was seeing how much surveillance exists in England. That was an interesting concept to consider.