This is a response to link above.
That entire post reflects one of the messages/themes in Umineko. The story has been left open so that the one truth is ambiguous, such that we readers can arrive at the conclusion we would like.
Is Rosa a good mother or a bad one? It’s hard to say because nothing about their relationship is written as red text. It’s been established that love and emotion require a leap of faith. There is no red text for love. So both conclusions “Rosa is a good mother” and “Rosa is a bad mother” can be reached at the same time.
Admittedly though, there is more circumstantial evidence pointing to Rosa being a bad mother. Chapter 8 was all a beautiful fiction made to teach Ange to trust again. The real truth may be ugly, and maybe that’s why it’s better not to know. If we don’t know, then both possibilities can still coexist. In the end, that’s honestly the one major theme of Umineko: Does magic exist or not?
You just have to believe.