Addendum
Alright, this section is for stuff I didn't cover in the reaction itself.
For starters, I'm aware that EmeraldKM also compared True Omniverse Season 4's take on Miraculous Ladybug unfavorably to the actual show, even after they admitted that MIraculous Ladybug is a dumpster fire and that Thomas Astruc is a bad writer himself. In general, reviewers are allowed to do that because in fanfiction criticism, people are gonna say "X is better than canon" or "Y is worse than canon." Why? Because they can, honestly. Also, if a story's worse than canon material, then reviewers have every right to explain why they think that. The bigger issue with Power Master being appalled at Emerald comparing him to bad directors was that Power Master lied about disliking Michael Bay to try and discredit Emerald, not that he was upset about Emerald saying that his Miraculous Ladybug rewrite chapter was a worse product than the actual show.
The stuff about the Cybonic Plague retcon: Emerald said it honestly wasn't necessary and criticized it for that. I agree with Emerald's stance, but for a different reason. Power Master could've had Pharma create the Red Rust virus or a different one while Megatron created the Cybonic Plague, and still kept Firebreaker's backstory intact. Like, you honestly could just swap out Cybonic Plague for Red Rust virus and still get the same result of "Firebreaker's parents and everyone at the refugee camp where Firebeaker used to live got killed off by Pharma experimenting on them with the Red Rust virus." Also, Megatron creating the Cybonic Plaue despite killing off Pharma for creating the Red Rust virus or a different one also helps underscore the first point Power Master was trying to convey without his stupid retcon: war erodes peoples' morals to the point where they resort to the exact same unethical tactics that they were opposed to. Sentinel Zeta Prime giving Pharma the go-ahead to make said Red Rust virus and test it on refugees still keeps the secondary point of governments condoning unethical things during wartime intact too. In summary, the retcon wasn't necessary to convey the two points even though Power Master had the retcon happen to do so.
This third point might be the last one on the addendum because I covered most of them in my reaction. Emerald being annoyed about how the only autistic character was written in a stereotypical fashion due to being autistic themselves is something that they're allowed to be annoyed at. Teresa is written in a weirdly infantilizing way despite her being 17-years-old, with there being several moments where she acts more like a toddler than a teenager, and as Emerald mentioned in their review, she's a plot device and not an actual character. She revolves around other characters the same way a satellite orbits around a planet: she's Julie's long-lost twin sister, she's Firebreaker's love interest, she's someone whose lie detector powers exposed Chloé and Lila as frauds, she's someone for the Decepticons to torture and for Gabriel to akumatize, and finally, she's someone who existed just to die in the end so Quintessa and Megatron could further their schemes. Speaking of Teresa being Firebreaker's love interest, he's an alien robot who's millions of years old while she's 17. Not only is that relationship skeevy for that huge age gap, but as it turns out, someone being older than 18 being in love with a 17-year-old is a sexual paraphilia called ephebophilia, where someone over 18 has a primary sexual interest in mid-to-late adolescents (15-17 years of age). So yeah, Firebreaker's an ephebophile, which makes him a sexual deviant. What a likable character you created, Power Master. Bravo.