I think mine’s Z for Zachariah. The book is insane. A psychological survivalist thriller between a 14 year old girl and a strange man with unknown intent. The movie is… not this. They changed everything meaningful about the characters and lost all the tension. Hope someone does it properly one day. What’s your adaptation peeve?
I’m not sure I’d call it the worst, but Eragon was pretty disappointing. Part of it was that the dragon didn’t look realistic (along with basically everything else).
But the bigger problem was that none of the characters felt real. Brom was disappointing. So was Roran. And Arya. And every other character. The mental communication also just felt wrong in the movie.