The Last Shadow by Orson Scott Card. What makes it horrible is that it was greatly anticipated and wraps up the other 10 novels and joins two separate timelines of the same universe - except without tying up ANY loose ends with plot. Absolutely nothing is solved in the final book and all the build up from each timeline is completely wasted in a wishy washy “conclusion” that leaves a looooooot to be desired. This is why you don’t take decades to write the final addition to your extensive universe.

A Planet Called Treason (also renamed as Treason) by Orson Scott Card. It’s an epic tale and I remember it as a grand adventure with an epic plot and surreal environment - but its a short book.

Their loss. While they may detriment from not reading, it’s just not a mainstream form of entertainment anymore. It’s human nature to take the path of least resistance and if you asked someone “would you rather spend a day watching lord of the rings or spend a week reading it for half the day?” Most are going to opt out for the movies. It doesn’t help that popular books get made into movies long before people even know it’s an amazing book. People read game of thrones and 50 shades of grey because it was mainstream to do it.