I think it's a German thing. Seriously.
For example, I absolutely adore Drakensang series. I love Aventuria and wish dearly that there were more English resources about it (or my Deutch skillz went farther than "Ich bin ein Krankenhaus"). But the puzzles in it (River of Time in particular) are horrid. The one that takes the cake requires two components from two completely unconnected boss fights on two opposite ends of the world map, followed by a 15-puzzle (
http://en.wikipedia.org/wiki/15_puzzle) that requires you to arrange the tiles so that they form a picture. I guess I'm not a reincarnation of Bobby Fischer after all, because I went at it for a couple hours, gave up and used the solution from the Internets. It wasn't fun, it was tedious and boring. I can play a 15-puzzle in real life with a real 15-puzzle. In an RPG, I want to slay dragons and find treasure.
D:OS has the same symptoms. Puzzles that are tedious and infuriating and add absolutely nothing to the game other than the player's frustration.
