I would like to throw in some "Tenko deserved better" to go with the "Angie deserved better".
I see an excellent character within Tenko, because when she's allowed to interact with other characters besides Himiko, it makes for very good stuff. Tenko's developing dynamic with Maki in chapter 3 is the main example. But there just isn't enough if this in the main narrative of V3.
Tenko absolutely deserved better. Tenko's character is poorly written in a very different way from how Angie's character is poorly written, in that Tenko falls prey to what I would consider one of V3's biggest flaws on the whole.
A lot of people would recognize what I'm about to talk about as a sort of "Kankri Vantas-ing" of characters - a very particular type of strawman meant to represent people who critique the story, usually for lack of diversity or racist/sexist/homophobic content, and who are then derided in-fiction for doing so as a sort of "gotcha" to fans who dared to be critical of their media. Hermione's belief in House Elf rights from Harry Potter is another famous, somewhat subtler (and far more insidious) example of this.
This is something really, really hard to avoid in fiction that centers around commentary about audiences and bystanders. The Hunger Games is a famous example that avoids this really well - even the people who the Capitol is meant to be an allegory for will criticize it, because the thing they're being critiqued for (massacre of children for sport) is relatable enough for people to make connections to real world situations, but distant enough from reality that it isn't taking personally (amongst many other reasons the Hunger Games succeeds with this).
In fact, I would also argue that THH does an excellent job with this, too. THH does a great job of presenting itself as very straightforward torture porn, only to slowly reveal over the course of the plot that the excessive violence has been deliberately made so gruesome in order to be used as demoralizing propaganda, both to the participants being observed and to the people across the world who it's being broadcast to. The realization that the gratuitous violence was being used towards a cause brings on a whole new light to us, the audience, engaging with it, and forces us to think critically about how such violence could potentially be used to influence us in similar ways in real life. That's powerful! That's a statement about propaganda that shines a spotlight on us as an audience without accusing the player of some inherent moral wrong! That's good shit!
When V3 chose to separate itself from this messaging, that did not by itself create a worse story; however, the decision to replace this with watered down "liking violence is bad" messaging, complete with blatant double meaning statements where the joke is You Should Dislike Previous Danganronpa Titles, is a HUGE disrespect and general kick in the nuts to these previous conclusions.
V3 does a TERRIBLE job at separating its in-universe audience from its real-world audience. That is the whole plot twist of v3, that there is an audience proxy of you, and they suck. And between Kiibo crying "robophobia" to mock any diversity-related critiques, and Tenko crying "degenerate male" and purposely playing into The Predatory Lesbian stereotypes to criticize specifically gender and sexuality-related critiques...hoo boy. It Gets Grating. And having to peel past that to see the genuinely compelling character info underneath shouldn't be such a slog.
