YMMV / The Misery Senshi Neo Zero Double Blitzkrieg Debacle
Critical Research Failure: The author makes numerous hilarious and obvious mistakes when attempting to document Japanese history and discuss its culture. This is particularly funny considering the author felt the need to dedicate a significant portion of his fanfic to presenting himself as an expert on it.
The author also, despite claiming to have watched every episode of Sailor Moon in Japanese, manages to prove repeatedly that he hadn't watched anything that wasn't dubbed into English circa 1997. In addition to Guerin repeatedly referring to "Chibi-Usa" as "Chiba-Usa", one hilarious scene involves the Sailor Senshi needing to heal a grievous wound inflicted upon Sailor Moon. Mamoru calls them on his cellphone and has Jupiter go and get Sailor Star Healer, who upon arriving demands to be taken to her leader. Keep in mind that A) the Sailor Starlights live on another planet that none of the characters ever visit B) "Their leader" is Princess Kakyuu of said planet C) Mamoru doesn't even know them, let alone possess a cell phone that can cross galaxies and D) Sailor Star Healer doesn't heal things. Now, rinse and repeat for the entire duration of the story.
Even the cast of Daria gets mangled. Why the hell is Mr. "I may as well have the flag tattooed on my forehead" DeMartino using an AK-47? (For those who don't know: an AK-47 is a Russian gun.)
Harsher in Hindsight: The story's plot of a terrorist essentially using a passenger jet as a missile to destroy a prominent target was plausible in 1998 when the story was first written, but also fictional. The riffing was originally released in 2000, when the same standard applied (hence numerous jokes and skits about it). Post-9/11, the subject matter is downright horrifying, and in the 2010 updated re-release, Guerin added a disclaimer re-iterating that he had written the story well before the attacks.
Padding: For some reason, the story spends a significant amount of time on Akbar doing such riveting activities as ordering his rental car and later on the rather lengthy process of ordering his plane ticket to Berlin.
Out of Character: Nobody is in character. One of the worst recipients of this is Daria, who is stripped of her acerbic wit and high principles and replaced with an unfunny sociopath who thinks it's hilarious to freeze and shatter a human criminal while stopping a bank robbery. But let's not forget Beavis and Butthead, who go from being unmotivated losers to vicious violent would-be rapists that stop at nothing to kidnap and force themselves on Quinn Morgendorffer.
The Sailor Senshi themselves are largely reduced to a hive mind. While the show itself could be accused of this when the cast got too large, the characters still had rather distinct personalities for the story to throw into the trash. In particular, Minako would not blatantly insult Ami for being too smart. Furthermore, the Sailor Starlights lone appearence in the story is already so far out of canon that it even disregards that because they live on another planet and never expected to see the main characters again, Seiya would probably be just a bit upset that Usagi was bleeding out on the ground in front of her considering she was in love with her. However, the only one of these characters to even speak any dialog is Yaten, and the others may as well not be in the scene since they contribute nothing to the fight or to Star Healer "healing Usagi". Rei is constantly seen speaking extremely formally and invoking various Japanese gods, something she never does in any incarnation (also, the gods are wrong for Shinto.)
Ron the Death Eater: Beavis And Butthead are, in their own series, crude at best, but too brainless to contemplate actual harm (they're more likely to hurt themselves). In this story, they've been elevated to violent rapists obsessed with capturing Quinn.