I gotta say Professor Snape here. Yes, he was bullied and couldn't be with the woman he loved, but that does not excuse all the terrible things he did. The death eaters are essentially a nazi group and he was a full-on member of that group before becoming a double agent. He was also horrible to his students to the point of being Neville's greatest fear. He was horrid, I'll never understand why he was suddenly so pure and beloved after the final movie where a lot was revealed. If you like him for being a complex character, I have no issues with that. But the ones that genuinely say he's an amazing guy, he was protective, and was always a secretly sweet character are just fans I will never understand