>>281698755
Denji does posses plenty of Courage and Justice(for Part 2 standards) however.
Pretty much every other relevant character is either completely apathetic or finds it justified to murder dozens, or even hundreds of thousands of people for the most stupid reasons, which makes Denji look like a saint in comparison.

Asa does also seem to show some concern over what is happening around her, though to a lesser degree than Denji, but she has such little autonomy over her own body that what she thinks doesn't really affect the story in the slightest, as Yoru just takes over and goes around murdering people with no resistance.

It's not really a complex story, Public Safety, Fumiko, Yoshida, Yoru, everyone from the Chainsawman Church who knew what was going on with the Fire Devil contracts or that participated on what happened with Nayuta are monsters who are on an infinitely lower moral ground than Denji who is for the most part a regular dude despite having a few vices that heavily burden him.
Coincidentally, those antagonistic forces also all feel perfectly deserving of having Pochita's erasure abilities to reshape reality at their will.

Fumiko and Denji's interaction in the last chapter perfectly encapsulates all that, she starts casually talking about how she murdered countless people across the entire world, then talks about why she thinks Death should be erased through CSM's powers, then finally once Denji makes a small protest, appeals to his lust.