The Wizarding World of Harry Potter was alluring for several reasons, but fans flocked to it for its vastness and heterogeneity. J.K. Rowling created an entire alternate universe that was full of good and evil characters who fought to gain control of wizards, witches, and magic. Besides Voldemort and Grindelwald, there was a slew of side characters who were so awful that fans dislike them to this date.
Source：https://www.cbr.com/worst-side-characters-harry-potter/
