Don’t be so hostile over a children’s franchise
Who's saying that? I never said she had to be some completely irredeemable monster. Her bold contrast to the rest to the rest of the Alola cast (minus a stubborn Gladion and Nanu) is what I like about her. Where are you getting that impression (as my response never touched the idea of her redemption)? Compared to everything else, yes, everything I noted is the highlight of her character. It's also the most common of her character traits to be depicted in fans praise for her.So the most one dimensional interpretation of Lusamine's character are the only high lights to you and the fan base? Villain does NOT have to equal, irredeemable scum, that was never the intention for Lusamine in S/M and it is evident when the anime and US/UM try to give her more depth. (If anything, S/M was the version that screwed her up. By only focusing on her villainy and half assing the depths to her character that the game tried to tell you about in the last quarter of the plot and after everything was said and done.)
In the games, they gave the back story on Mohn disappearing into an ultra wormhole and causing all sorts of trauma to Lusamine. In addition, they out of the way to imply that she was intoxicated by Nihilego before you met her. (Enhances your traits ten fold, dull mental inhibitors and redirect your priorities for the benefit of Nihilego.
Compare certain scenes with her in S/M to US/UM. The later is where Lusamine is less extreme and her plans have nothing to do with Nihilego, but to stop Necrozma, who was the looming threat of the story. (Note, the Mohn trauma still resulted in messing her up and resulting in her becoming abusive, the entire part of Lusamine's development in the Ultra games is getting the wake up call that she isn't as good of a person as she thinks she is and turning herself around for the better..)
Before you say, nothing in the games suggested that she wasn't infected by Nihilego. The difference starts becoming apparent in US/UM right after you meet Nihilego and beat it, unlike the vanilla games, she makes no crazy smile and the URS arrive to explain Necrozma. In addition in S/M she was very vague about what Aether was doing down at the labs, in contrast to US/UM where she flat out told you that Aether was doing a wormhole experiment and it wasn't going as well as planned.
More examples that Lusamine was drugged out of her mind in S/M
Also, Lusamine in the anime, didn't suddenly go insane from her inner interest in the UB's. It was implied through the Arc, that since she was a child, she wanted to meet an Ultra Beast, two times they flat out told us, the third one was when Lusamine was in brief awe at Nihilego's arrival before focusing on protecting her kids. Once Nihilego took her into Ultra Space, that is when Lusamine gets dooped up on the venom via becoming the mother and became nuts, because THAT IS WHAT NIHILEGO VENOM DOES TO YOU! It makes you got nuts from your our of control traits and flaws by dulling the conscious barrier between what ever impulse goes through your head and common sense.
I don't really care for the rest of the "Before you say...." onwards as that has nothing to the point I'm making as to why people are against her characterization (which you seriously are exaggerating. It's just a preference)