She really was a rotten, terrible person up to this point. The novel makes sure to point that fact out. She wasn't just a proud tsundere. Without meeting Nie Lie, she would have gone on to become an even worse person, as his past life showed. She needed someone to put her in her place and show her she can't get away with being such a horrible person, in order to change.
hold on these translations don't right i was skeptical about the bible part but then she said "get lost gay" and i was like yeah must be troll translators like bruh