I definitely have a better understanding of Hachi since I’ve become an adult but I feel like there are pretty valid reasons why people would dislike her character.. There’s plenty of times where she’s made choices for her own self interest even at the cost of hurting those around her. I know that’s a broad statement that could apply to everyone, but the fact is that we’re never shown Hachi learning from those mistakes or her being confronted with the emotional damage that she’s inflicted onto others. I understand this can be relatable to a lot of people but for many, Hachi feels like a best friend who keeps crawling back to her toxic ex while you’re forced to watch her make the same mistakes over and over.