Honestly I personally don't mind that part. It happens in real life. Sometimes parents are just so up in their butts and think they know what a child wants and needs.
My primary issue in this is that the daughter forgives the mother SO EASILY. Just one look at a diary full of unsaid words and, poof, all is well and forgiven. Now THAT'S fiction.
I dunno if it's forgiveness or understanding. And either way... her mother's dead. What would be the point of hanging on to the resentment? To let it fester and cling? Moreover, the daughter was never truly resentful, but instead indifferent. Or... resigned, I suppose. She thought her mother didn't care at all, when in fact the mother
did care... she just couldn't convey it properly.
I do feel like not getting any POV or words from the father was a mistake, for sure. Especially what with him being an afterthought to the point of his wife not being buried beside him. But given he's implied to have been dead for several years since then, I suppose it makes sense.
I think there's supposed to be a sense of tragedy to this chapter that escapes most of us, or at least didn't land as intended. The mother loved her daughter but clearly felt unqualified to fill the role in a traditional capacity. Especially after discovering that her daughter is "like her." We get a vague hint the mother had a terrible childhood due to her implied autism, and was frightened for her daughter. In tandem with making a terrifying impression whenever she was panicking- which implies her "anger" at her daughter breaking something was instead panic for her wellbeing- she latched on to the idea of "understanding."
Specifically, that by researching the bear, his peoples' language and culture, and the surrounding area, she could bring about a better understanding of the bear-peoples' species. An understanding through which these bears and humans could connect. A connection and understanding she could provide to her daughter, who- like her- is implied to be autistic and unable to connect with other human beings in a traditional capacity. But that inability to connect in a traditional capacity extended to mother and daughter as well; the daughter had no idea the mother cared, and the mother is implied to have thought her daughter's resigned apathy was standard childhood things.
By the time the mother had finished her research she seems to have realized her mistake, believing her daughter was making her own way in the world. So she did the only thing she thought she could do at that point: publish her research, provide funds for her daughter, and live out the remainder of her days among the people she had been able to forge a connection with.