LogFAQs > #881785006

Again... because you hardly bothered to get any upgrades. I think the hardest part of the game is probably a different thing for each person since it depends on how powerful you are when you go into certain parts of the game. The common enemies and Yiga start becoming more difficult as you progress through the game, but I don't think the guardians change at all, and since Hyrule Castle is guardian-heavy that's probably why you're finding it so difficult. Granted, you didn't seem to have much trouble with any of the Divine Beasts and I don't think those have any dynamic difficulty either.