No, on contrary, I am sastified with the duel of Demise. The Demise Battle is not considered to be easy as people say in my experience as everytime I let my guard down in recklessness, Demise whooped my butt around with heavy damage. If it wasn't for the potions, I'll be screwed. But I wouldn't say it was the hardest battle as Ghirahim before is more of a challenge and a pain, but it was certainly epic with all of the music, background, and lightning filling up. The only way to beat Demise is through your skills alone and thus the sword duel show how much you've grown over the course of the adventure, whether it's very hard and easy. The last fatal blow brought a smile to my face as I defeated my wretched enemy for all the suffering and pain he has caused to Zelda and the world.