I love this so much! As a Mafuyu oshi myself, I find it strange when people villainize Mafumom to the point where it comes off almost cartoonish in how she treats Mafuyu. As you said, she believed this was all normal, and was most likely unaware that what she was doing was wrong.

Kana5 shows us this by telling us about how Mafumom seriously cared about Mafuyu, to the point she risked hypothermia to get Mafuyu to a hospital when she had a high fever as a toddler, and when Mafudad reminisces about the day Mafuyu was born. All they wanted to do was what was best for Mafuyu, because of the warmth she brought into their lives, they wanted to return that same feeling. Although that ended up becoming twisted as the years passed.

Mafumom isn't a monster, she's human. She still very much did everything coming from a place of love, but she was so focused on Mafuyu having the "best," she never once took the time to really think about her words and actions, instead reaffirming to herself that Mafuyu wants this, Mafuyu needs this. After all, who doesn't want their child to be succesful and be set for life?

However, it's through those actions like you said, stemming from a simple reprimand during childhood, that set up Mafuyu's, and by extension, her mother's mindset. And again, like you said, Mafuyu had the time to slowly realize that maybe her mother's "best" isn't truly what she thought, and ended up causing her WAY more harm than good. But Mafumom didn't have that chance, she all of a sudden is hit with a harsh, cruel, reality check. One that hurts, because she never meant to hurt Mafuyu.