The key disappointing areas in Zelda for me:
- The general audio and lack of thematic music
- How barren the world is and the lack of any story (even the lore is extremely light) or key characters
- It's pointless fighting enemies, it's better to just run past them all as you just burn through weapons with no reward
- Having to just sit and wait when it rains and you're on a cliff
- The game starts off with a decent challenge but after 10-15 hours the game becomes trivial and you can just mash attack on everything
BotW having a barren world where you are discouraged from fighting creatures makes the game really seem hollow compared to most other open world games.