Great game but letdown by the ending. Throughout the whole game you had the castle in the centre that seemed as the main focus, and when you get there, I was expecting a grand design of a castle and the interiors, instead you are left with something that felt small, hollow and wasn't that great.
I agree. I'm a coward and refused to beat the castle except when I had my ancient soldier gear fully upgraded, all hearts and all stamina bar
Then I entered in the castle and beat it in 15 minutes, plus more 10 minutes to beat Ganon
I returned later to explore a bit more but the place is so ugly and annoying that I given up and never back to game again