I Really Don’t Want to Be the Favorite

Jiang Mo transmigrated into a book and even got a doting-family System. The malicious System told her that as soon as her three older brothers' affection scores for her reached minus one hundred, she could return to her original world. So Jiang Mo went to great lengths to make her brothers hate her a little more. But... why did the progress bar keep moving in the positive direction? And why was it going up so fast? When she was bullied, their affection scores went up; when she bullied someone else, their affection scores went up too; even worse, the scores went up when she hadn't done anything at all! Jiang Mo was close to tears. System, is there something wrong with your algorithm?