Great Acting, Great Cinematography done in by Lousy Script...
The British don't really seem capable of producing compelling adult drama. There writing is stuck somewhere in the 1940's and everything they produce is so cartoonish and lame. Like some kind of after school special.
Pine is a single loser with no money and no real prospects who by the grace of god is somehow injected in to a world of wealth and power where his every desire can be satisfied and he's not even the slightest bit tempted to embrace it? That isn't believable. They are not writing a human being when they do that.
Ditto for Jed. She's going to just throw everything away because Roper sells guns in addition to tractors? Go back to America and suck cocks at truck stop restrooms to put food on the table for her kid? This makes no sense whatsoever. Consider Wall Street, written over twenty years ago. When Bud asks Darien (who is by then his actual girlfriend) to join him in turning on Gekko she flatly refuses and they break up. This is the normal, realistic reaction to such a proposal. Jed's eagerness to bite the hand that not only feeds her but has from everything we've seen been incredibly kind and loving to her as well makes absolutely no sense.