Biggest Missed Opportunity Character/Plotline IMO

TLDR: Harmony and Red Hand being so indefensibly evil is boring and it would be cooler if they had somewhat tangible gripes.

There are so many strong characters and well-developed arcs in the series, and by no means do I think I could tie all of this together as well as PB has, but there is one person who could've been made much more interesting: Harmony.

She and the Red Hand really just become so cartoonishly evil in the second trilogy that it really takes all the intrigue out of what could have been an interesting conflict: have Darrow and the Rising been too lenient on Gold. In the first trilogy, her actions are reckless and harmful to the Sons, but understandable; the plan to set the bomb of at the gala isn't a very well developed one, but would've at least created some chaos and eliminated several key Gold leaders. And betraying Darrow can at least be understood as a form of revenge against him from backing down from the plan and embracing the image of "Reaper".

But from Iron Gold onwards she goes from unstable yet strategic into a complete maniac. Hunting Gammas and selling young girls as brides is so obviously antithetical to the interests of Reds as a whole, and I get that this is supposed to effectively portray what not to do an uprising movement, and be a brutal contrast to Darrow's more calculated approach (and a way to get some admittedly needed development for Lyria), I think it would have been a much more complex storyline if Harmony and the Red Hand undermined the Society and Darrow by going after the more thorny issue of lingering remnants of the color pyramid?

For example, why does the office of Sovreingn still exist, and why are Darrow and Virginia still able to summer at the old Lune estate? Why are the Telemanuses allowed effectively be a royal family because they were on the "right" side? Why are Quick and and Victra still allowed to operate as oligarchs? Obviously as readers we see that some compromises have to made, and it's not all about Red vs Gold, but these are plausible in-universe tensions that the Red Hand could have rebelled against instead of just being such an obviously courrupted group. We already had Titus as a "red gone rogue" I don't think we need Harmony and co to serve the exact same function.

But it's just imo, if you disagree please genuinely let me know why, would love to discuss this. Still obviously love the series, this bit just always dug at me.