It is not about revenge. Guts gave that up when he stopped hunting Griffith. It is not about swords. It is about the space between strikes.
The genius of this arc is the villain: Mozgus. He is not a demon. He is a holy man. He tortures "heretics" with genuine, psychotic belief that he is saving their souls. Miura’s point is devastating: The God Hand doesn’t need to destroy humanity. Humanity will build its own torture chambers and call them chapels. All Of Berserk Manga
This is the central paradox of late Berserk . To fight a monster, Guts must become a monster. The armor gnaws at his humanity. The only thing saving him? His friends. We finally reach the chapter 355 mark. The long boat ride ends. Guts and Casca reach the Island of Skellige, the last refuge of magic and elves. It is not about revenge