I've always hated how the most frustratingly difficult puzzles in some games (RPGs especially) are not actually meant to be hard. They're the "puzzles" where you simply did not see the place where you were supposed to go next, the button you were supposed to press, or whatever, and you spent hours wandering around looking for it under the misconception that it's actually much harder than it really is. The problem is, this happens to me all the time.