Penhallow (by Georgette Heyer) might be the one. I have only a vague memory of why I detested it so much (according to Calibre, I read it at the beginning of 2013 ... and gave it one star!) but I definitely remember wanting to toss my Kindle after completing the book, I was that furious at the ending. (I'm almost tempted now to pick it up again to see what really all the fuss was about
)