Worst mess up? This’ll be a tough one to pick. Oh well, I can’t go too wrong detailing the three worst things my protagonist did. Why three you ask? Two of them are nearly identical in how they affected those involved and the protagonist while the third one would be a mistake in a different way.
Firstly, the “Exposing a Resistance Group” one.
So to give some context, the protagonist (Io) in question was born in an oppressive underground feudal society run by a Mega Corporation that produces her kind (robots).
Eventually, some of her fellow bots got sick of all the problems that the MegaCorp allowed to happen: corrupt religious leaders, hyper-aggressive police force, sending robots out above ground to serve as foot soldiers, turf wars; the whole nine rounds.
They formed a secret resistance group with the intent to stop all that nasty stuff from happening again. Some of the people who joined this organization were friends of Io. At first, Io held no reservations about the group, thinking that they just wanted to improve the status-quo rather than destroy it.
When she learned of their actual goal, Io was confused and distraught by their seeming “betrayal”, and through a mix of pressure from the High Priest running the religious sect she’s a part of as well as a general obligation to do “what’s right”, she would end up exposing the group and its members O’Brien style.
Io was rewarded for this with a handsome one million credits and the clout for exposing this “terrorist group”.
She wouldn’t think of this incident again until she herself was exploited (that is to say, deflowered) by the High Priest and publicly executed; left to fester in the trash pits.
This experience would obviously change Io’s perspective on the group she’d help to expose.
Soon enough, she’d find out what happened to the friends of hers that had joined the group.
Two of them (nicknamed Deject and Reject) suffered the same fate as Io had, having survived thanks to a freak mutation allowing them to respawn and entering a contract with a hyper-intelligent chaos AI respectively. They hated her for what she did, and it took a long time for them to make amends.
One of them (Metaljacket) was discharged from the Peace Division (War Division) and entered a contract with an insane scientist robot who gave them the ability to survive almost anything in exchange for slavery and extreme pain.
But by far the worst of these fates would be what happened to a currently unnamed character.
They were the leader of this organization and they’d of course get the worst of it.
He was trapped in solitary confinement and was tortured using a variety of techniques including but not limited to flaying his outer coating of metal, inflicting him with a disease that ate away at his inner organs, and using a painful frequency of noise to reduce the once charismatic and compassionate robot to a mad raving lunatic that felt only pain, anguish, and hatred for the one who ruined his life: Io.
While Io would end up making amends to most of her former friends, she still experiences a hell of her own guilt whenever the subject’s brought up, regardless of her friends’ attempts to reassure her that she didn’t know any better.
The second one would be that one time Io flayed off an unfortunate soldier’s face in the gladitorial pits.
In her efforts to make amends for Mistake One, Io would enter herself into the Arena: a gladitorial free for all a la the Hunger Games.
At first she struggled with it, but eventually Io became decently good at it.
In her confidence, Io would encounter an enemy in the Arena and beat them senseless.
Eventually, the combatant (Void Face) would lose his face to Io injecting him with an explosive compound from her needle glove, being killed in the arena.
Io didn’t know at the time, but Void Face was a soldier enlisted by Sergeant Hard Times, and was in debt to the aforementioned Peace Division.
Void Face’s body would be reconstructed from what little was left of it. Unfortunately for him, his face was irrecoverable.
To cut that story short, he became insane and started committing hate crimes against the type of robot that Io was (TV head). Void Face would further lose it when Io didn’t take him seriously in their next few matches. This would provoke Void Face into fusing with the AI overseer of the underground society and destroying the region where Io lived as well as killing what few TV head robots were left.
After these events took place, Io felt horrible; she hates herself for sparking the fire that is Void Face’s rage via mocking and ridiculing him even if she didn’t realize how hard he would take het reactions, as well as killing off most.
Like the last incident, Io’s guilt over the event would never completely fade, even after realizing that Void Face would’ve probably done something like this, whether it was because of her or someone else.
Finally, the big one. The one time where Io impulsively killed the AI Overseer of her society and the executives of the MegaCorp, leading to the uprising of the machines and the deaths of 25 percent of the populations of mankind and 50 percent of all machinekind.
At the end of her attempt to win the Arena’s championship, Io began to see the logic of the group she exposed in Mistake One, and decided to co-lead the revolution with the insane scientist robot from earlier (Arach), his Illuminati-esque cabal of conspirators, and the weapon who was groomed by the MegaCorp to be their champion (Thanatos).
Io and Thanatos would push for a more aggressive assault on the MegaCorp. They would end up getting their way, with their efforts being the main reason for the MegaCorp’s collapse; Io herself would kill the AI Overseer running the corporation and its puppet board of directors.
A time would pass in which Io felt proud of her acts; she believed that she had liberated her kind, and that humans and robots would exist in harmony.
Of course, since there’s still 2/3 parts of this series that didn’t happen yet, Io was wrong.
Thanatos would take control of the revolution’s forces, locking up Arach and his co-conspirators for “treason against the machines” and he would boot Io out of the organization once it became clear she posed a problem.
Long story short, Thanatos’ new dictatorship began a series of attacks directed towards any humans they came across, leading to millions of deaths. This in turn lead to more bloodshed from 3rd party groups.
Naturally, Io felt extremely guilty for enabling and kickstarting the attempted genocide of humanity by machines due to both the death toll as well as the fracturing of man-machine relations from this moment onwards.
Even long after the effects of the war long ceased, on some days Io wishes she didn’t exist so that she wouldn’t be able to ruin what should’ve been a victory for everyone; not just herself.
Wow, that turned out long. If you’re somehow still reading this, then thank you I guess.