1) The low opinion fans have towards Anna and her mother:
At the beggining of the movie Anna was a loner and clearly didn't like being around kids her age but have in mind that she had social anxiety and still did her best to be nice to Nobuko and the other girls until Nobuko unintentionally embarrassed Anna but she was still very nice and polite with her aunt and uncle, helped them with chores and while distant she was not rude towards Yoriko.
2) The fact that Anna's parents are ignored in favor of Marnie:
Ok I know the movie was about Marnie and Anna but I didn't like how fans treat Emily like an ungrateful daughter despite what Marnie put her through. Seriously the poor girl was so young and had just lost her father and her mother whisked her away to boarding school until her teen years to crawl into a corner and cry for 7 years yet after Anna hears Emily's story the only thing she thinks about is Marnie. She mourns for her grandmother but not for her birth parents. Granted she has her foster family but that doesn't mean her birth parents should go ignored.