Wrote a Viktor Analysis that I thought I would share
(Did this a few months ago and just didn't really bother putting it on here since there are so many more lore skeptics here than on the League subreddit. tl;dr at the bottom)
From his Biography:
He devised a chem-shunt helm that allowed an operator on the surface to bypass the wearer’s fear response and, effectively, control the diver.
Viktor seeks to remove control from an individual. Compare this to Jayce's lore (Biography):
While Viktor considered this feature a brilliant means of reducing the frequency of construction accidents, Jayce found its indifference toward free will immoral.
Viktor is not ambiguously evil, he is explicitly evil from an individualist perspective (Piltover is very pro-individualist). This goes further when, from Jayce Biography:
More than that, they both knew what it was like to be ostracized by their colleagues: Viktor because of his unconventional thinking, Jayce because of his rudeness.
Viktor was ostracized because he was doing wrongthink. Jayce was just that much of a privileged dick:
earned the honor of being the youngest apprenta to ever... Utterly unsurprised, Jayce took the offer
Jayce literally is one of the most privileged idiots in Piltover... Okay... In any case the chemistry here is amazing. From Viktor's:
A heated discussion between Viktor and Jayce on free will and mental enslavement turned bitter - almost violent - and the two vowed never to work together again.
Yeah, Viktor is for slavery. Great way to make someone seem morally ambiguous in a single sentence. Meanwhile our pureblooded Piltoverian continues to do the impossible, become a slightly better and nicer person by finally facing the first challenge in his actual life (J):
If they wouldn’t give up, Jayce decided, he wouldn’t either. And maybe he’d try to be nicer.
Maybe.
Maybe the rest of the academy still thinks he's an annoying asshole. Just keep him away from the ladies before he engages his tractor beam gaze and 'boards them'.
Meanwhile, Viktor is slowly becoming a mafia boss (V):
But if you were desperate, Viktor was the man you went to.
Write this about anyone else and they instantly sound evil. "But if you were desperate, Mark Merill was the man you went to." Wow, the Benevolent Overlord sounds really spooky now!
Even if the ending paragraphs do present Viktor as slightly better and at least justified, they completely ruin his previous character. The Old Viktor was about striking out against an unjust system (Stanwick making the copyright of Blitzcrank) and ultimately trying to improve humanity through mechanical means. Although Jayce lore made him sound really bad (especially from the Jayce fans with the propaganda comics), it was pretty obvious that Jayce was a manipulative bastard that Viktor wanted to strike out against because he represented the fault of the system that Viktor wanted to replace. With the previous political relations that Zaun had with Piltover in the old lore, it wasn't uncommon for some raids here and there between the two (with the Piltover Institute providing no help to Jayce). He just got unlucky one day with the narcissistic Jayce and that's how Jayce got his fame.
New Viktor only regards institutions as irrelevant before his ultimate goal (previously this was just ambiguous enough to be extrapolated as industrialization). His only interaction in his character is with Jayce, and in that quiet little side story that results in him selling drugs to children (even in the case of it being a placebo the kid can believe he has taken an amazing drug to bully his bullies). As it stands, there is no third party to explain the rivalry free from bias and therefore the entire story is complete speculation so as to avoid any sort of actual scrutiny. Personally I would have derailed Viktor's Evolution following the Jayce incident and try to re-integrate into a society against the disparities between Zaun and Piltover while also disapproving of Urgot because of his basic savagery and cultism. You could even have him start to understand emotions if you want that sort of plot.
In conclusion, while the Jayce v Viktor story has morally ambiguous elements, these are largely superficial before the undeniable evidence that the moral conflict itself is binary in nature. Jayce lore was written first, then Viktor's lore and then Narrative DELIBERATELY MADE Viktor's piece morally ambiguous by cutting out and replacing entire paragraphs in the easiest and cheapest ways possible to put off the naysayers as if to say 'we can listen to you!' when the entire Viktor community was in uproar over the complete obliteration of his character.
Old Viktor was dynamic enough to be explored and could have gone in enough directions that the Jayce fans ultimately corrupted in the name of their asshole main. New Viktor endorses slavery.