It seems Daido went insane because he saw the innocents and Mina killed by Prospect, and thanks him for showing him what Hell really is. After defeating the dopant, NEVER decides to end the usage of GaiaMemories once and for all by using them to destroy the location of Museum.
I think he is devastated that he couldn't save them all because they are human. So, he decided to use the X-Bicker to change everyone into NEVER so that no one will have to die. Didn't he said his purpose in A to Z? Him saying hell might just wanted to hide his true self...
I think he is devastated that he couldn't save them all because they are human. So, he decided to use the X-Bicker to change everyone into NEVER so that no one will have to die. Didn't he said his purpose in A to Z? Him saying hell might just wanted to hide his true self...
Wasn't it said before that after watching this V-Cinema, you will have a complete view of Daido if you rewatch A-Z Forever. I think this is the reason.