I have only thrown one book across the room and that one was so badly written it was trash. Complete garbage. No, there was nothing to enjoy, nothing to find good about it.
That doesn’t mean I haven’t had a few books I’ve enjoyed but have still been left scratching my head in confusion. Sometimes it’s a simple matter of me not following the author’s thought process – maybe too clever at hiding clues? Maybe too Science Fiction for me or too fantastical? Maybe I didn’t connect strongly enough so I didn’t retain the story to fully understand it.
Or, simply, it was a time killer, fun while it lasted and nothing more to keep it in mind.