My vote is a three-way tie between A Separate Peace (forced to read it in high school), Lord of the Flies (ditto), and The Magus (world’s longest shaggy-dog story).
I read The Magus only a few years ago out of curiosity. John Fowles toys with the reader the way the Greek sadist toys with the novel’s narrator. Eventually you realize that the mental torment he’s putting the poor patsy through on that island is a metaphor for the mental torment the novelist is inflicting on the reader. Knowles had a great idea for a ripping good story. But instead of admitting he didn’t know how to write it, he went ahead and produced a hugely bad novel out of sheer contempt for the reader. He keeps teasing you that the payoff is just around the corner but after 656 pages the payoff never comes. He couldn’t even write an ending for it! The stupid book just stops with no ending.
I welcome this chance to get back at John Knowles, John Fowles, and the rest for the dreary crap they put me through.
What’s all this about Ethan Frome? I never heard of it apart from everyone at the SDMB unanimously slamming it.
I read The Pushcart War when I was maybe 9 years old. I don’t remember it being disjointed in style. I totally dug the plot of the little guys banding together to get the big guys. It was fun.