Alright, Lockhart was a bad person, we get it— but how is he tied with the Carrows? They’re Death Eaters, pure evil. Detention? Using the cruciatus curse on eleven year olds. They tortured children for pure amusement, and made it where of age students that were to have their seventh year next chose to risk their lives as aurors instead of going back to school. They tortured and abused students, and forced children to torture each other. They made students hide out and sneak back and forth through a portrait just for food, just because they were supporters of someone they grew up with.
Oh but yeah, a fraud is just as bad.