Blas pls, we already went over that ground at quite some length.
I don’t particularly care about Igarashi one way or the other as an imaginary human being; I’m just quite surprised that so many readers are so eager to read against the grain of the story in regard to this character.
Every fiction sets up its own implicit value system and moral code, one that is adjacent to but by no means identical to that of the real world; so sometimes chopping the heads off scores of people is good and righteous (Icelandic sagas, say) and sometimes calling someone by their last name without an honorific is a heinous offense (Jane Austen’s novels, or many manga).
In terms of the Hana ni Arashi storyworld, Igarashi is by far the nastiest piece of work we have seen (although not extraordinarily nasty in real-world terms), and, at least from what we have seen so far, a redemption arc for that particular character would alter the trajectory of the story into a new, and for me digressive, direction.