You bring up some very good points, though I'd argue that the parallelism runs closer and that the comparison should be made at the appropriate character stages. It's easier to make "Yami, Hikari's friend" look good (but not really much better, I might add) when compared to "Hebikawa, not Kusunoki's friend". However, what if we checked Yami before she became Hikari's friend? Then we meet a gloomy, abrasive character who actively shuns every attempt to befriend her. Who suddenly dumped her boyfriend without explanation and ghosted him. Who tried to get a person she found annoying into a dangerous online date to teach her a lesson. That's all much worse than Hebikawa has done at the same equivalent stage.
Mmm... that's probably a valid point.
Yet Yami got better (at least for a time). She learned to appreciate the friendship of the person she looked down on. If Yami, who did worse than Hebikawa, could do better, why would Hebikawa be deemed less redeemable?
Well, I hadn't looked at it from that perspective until I read what you wrote above, but I had an immediate reaction the first time I read this. But since I read your entire post before I started this response, I won't bother to go into it, since you said pretty much what I thought:
Hebikawa can't (or shouldn't) win the Shizuki-Bowl until she acknowledges and makes amends for what she did to him. Yes, they were simple kids, and it was a clear case of "For Me, It Was Tuesday" for her, but it was a key trauma for him.
Exactly. That's still a distinction that can be made. And as I said, it was my first thought on how Hebikawa could still be said to be even less redeemable.
Though note that that wasn't my reasoning initially - it's just a sort of immediate "Well, yes but..." reaction to your point about fairly comparing them at similar points in their personal arcs, so I'm not presenting it as an argument - merely a report on the way my thinking went along the way.
I'm not sure what my view is on the broader question now. I still reject the idea that Yami's worse (and definitely not because of any sympathy for her - I'm pretty sure I've said even worse things about her than about Hebikawa - it's just that I can see Yami trying to be a better person, which is definitely more than can be said for Hebikawa).
In a way, reminds me of how Hope You're Happy Lemon tiptoed around a similar issue until the manga devoted a big flashback arc to deal with it and bring closure once and for all.
It did?
I dropped that one specifically because it was so frustrating that Sunao seemed to just instantly set his supposed big deal trauma aside completely, and the closest Lemon ever got to dealing with it was musing to herself that it was unfortunate, because it was a lie from the start. It just seemed way too unrealistic to me that it didn't get addressed or even much mentioned.
And in fact, I'm pretty sure that in an earlier thread for this one, I criticized it specifically in the context that I'd already seen enough of this bullshit with Hope You're Happy Lemon.
Huh...