There's something about Dolores Umbridge , Harry's Defense Against The Dark Arts professor from his 5th year, that continues grinding readers' gears years after reading Harry Potter and The Order of the Phoenix for the first time . Many Potterheads even cite her as their most hated villain, superseding the series' ultimate villain, Voldemort . Why is that? I believe it's because Voldemort represents a type of evil that is terrifying but not relatable: I'm guessing you didn't have many red-eyed…