Well you are right in the fact that the final boss fight is not fun, or at least not compared to the high standard set by the rest of the game. Calamity Ganon is by far the biggest disappointment of the game imo.
As a parent gamer, I admire the ability to disconnect and go to YouTube for content you don't necessarily want to complete in-game. Even on games I sour on, if I reach a certain point in progression I will basically force myself to push through until credits roll.
Tales of Arise is a recent example. I should I have youtubed that game from the halfway point