These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Arc Fatigue: The author interrupted his own narrative to dive into a series of side-plots and digressions that had absolutely nothing to do with the central story, including time travel, the space race, and now a fight with vampires. Several of the story's reviewers have used the phrase "gone off the rails", while other reviewers have said things along the lines of "lost sight of the original plot" about the author.
Most events of the story are never relevant or referenced again, meaning that Arc Fatigue can set in very rapidly as the reader starts to see it as an unrelated series of vignettes.
From Bad to Worse: You can map the mental breakdown, both of the Fic and the author chapter by chapter. Itís as horrible at its sounds.
From casual murder to mass brainwashing to people-are-property to very Hitlerian takes on racial types to nuking the Middle East because of Islam and not caring it initiates the collapse of human civilization.
Moral Event Horizon: Dumbledore is way past this apparently from the start to the point of ridiculousness. Harry crosses it in Chapter 9, when he kills Snape for the first time.
Nightmare Fuel: Chapter 9. Snape tries Legilimency on Harry, only for Harry to rebound the effects on him, making him claw out his own eyes, breaking his mind, and finally making Snape's head explode, while he's screaming in complete agony the entire time. This is in front of a class full of third years.
They Wasted a Perfectly Good Plot: The concept is fascinating and the story actually seems to play it out...but then you realize the author doesn't intend for Harry to be Drunk on the Dark Side and he really is supposed to be the hero and his morality really is supposed to white as the driven snow.
Villain Decay: Voldemort and the Death Eaters, principal antagonists of the original books, are reduced to a mere sideshow of the overarching Dumbledore-versus-Harry conflict in this fic.
Dumbledore is killed over a dozen times in the fic, in an extremely casual fashion each time. He's the big villain of the fic, but he never gives the impression he's remotely effective/competent or that he couldn't be disposed of more permanently with some minor effort.
The Woobie/Unintentionally Sympathetic: A spell on Snape causes him to just decide to horribly torture Draco Malfoy in Slythiren common room, in front of, among others, 1st years. The timing on it is such that Oblivate can't be used on any of the kids. Regardless of the trauma of the mooks somehow Draco lives and apparently Perfect Lionheart thinks it's just desserts for Draco to be turned into a woman, forced into a breeding program where he has to give birth to twenty-four children, sired by Crabbe and Goyle's fathers who think BEATING THEIR WIVES ensures conception, and allow the other Purebloods to torture and abuse him repeatedly because thanks to Harry's machinations he has no title, no money, no last name or family. It's thus understandable why he's more than willing to become a fanatical killer like Bellatrix to escape the breeding contracts so he can't be raped or abused anymore.
also at one point Nacissa says "All three of them (Lucius, Rabastan and Rodolphus) were far more interested in Draco than they ever were in me or Bellatrix."