Well why not? It's wonderful! Once you realize that not matter what you do, you'll fail in the end. You'll die anyways, so why not embrace what makes it great!

[He sounds almost gleeful about this.]

Junko Enoshima. She's the one who showed everyone how amazing despair can be! She's like a goddess! I'm sad I never got to meet her... she's been dead for a while now. So I started this to honor her! Seeing everything she's done opened my eyes... everything that's happened to me during the war has sent me into so much despair... it's a real nice feeling.

[Evidence list!]