A few more questions:
1) Harry beats Voldemort because he has the allegiance of the Elder Wand because he disarmed Malfoy who had disarmed Dumbledore. However, Harry didn’t win the Elder Wand from Malfoy; it was just Malfoy’s regular wand. So why would Harry have the allegiance of the Elder Wand?
2) In the first book, Dudley’s friend Piers is described as “a scrawny boy with a face like a rat” yet a mere six pages later, we are told “Piers, Dennis, Malcolm, and Gordon were all big and stupid”. ??? ?????.
3) Hermione says that she has never done a memory charm before, yet she had already modified her parents memories. Maybe you can be mechalek between wiping memories and changing memories.