
I was shocked on the sudden changes in art style.
I hate it when a manhua suddenly changes it art style and mostly I dropped it.
But I will give this manhua a chance.

id suggest not to merely off of the fact that such a noticeable artstyle change is disrespectful to the story itself. and upon rereading you'll probably feel the same disappointment again. it is upsetting when this happens because the characters are not the same as you knew them. their expressions, aura, demeanour change.

MC's hate is invalid.
I mean, you can't blame her. She totally warned Ophelia about that guy (Nix) but she keeps insisting that he's not then it turns out to be true and what's worse is they gravely suffered from it. Not just their family but their whole territory. Ophelia reviving her doesn't makes it a reason for the MC to be indebted to her. And to add a cherry on the top, the moment she woke up, she saw her run a way. If I was her, my thoughts were gonna be like this, "Huh? She run a way? After all the things she have done, she's going to run a way? What a f@cking b!tch! This is all you fault! You should have died instead. After all the mess you made, you f@cking coward! I won't forgive you!"
And that's a normal reaction from that POV. But even in that kind of circumstances, she still cares for her in her own way. She hates her bcuz of what she's done, of course, she will never forget what happened but the times they spent moments with each other and caring for each other also doesn't fade. And besides she doesn't know anything unlike us readers. Tho she knows the other story in the mysterious book. Her being a mere character for that kind of MC(Ophelia) is not unacceptable.
So the bottomline here is MC's hate is valid, you don't have to say it's invalid because you're not the one who suffering. It's her.
Her reason is so fucking stupid I don't want to hear anything from her.
She NOTICE that her OWN daughter doesn't smile from the heart but DIDN'T notice her adopted child is a BITCH?!
You got idiotically scared of your own daughter by the fact that she seems more mature in such a young age? Isn't it much favorable for the household to have a child like that? Like seriously?
There's a lot of worse parents out there but you're the worst. And as a noble lady that is married to a ducal household, you're so fucking stupid, I thought you're from the commoner background. Not to insult the commoners, but maybe you're mentally ill like Trashta.
You should blame yourself for not making your OWN daughter emotionally stable. As a mother, IT IS YOUR JOB to take care of her and teach her the way of life like you want her to be. Not fucking disowned them once you realize you don't LIKE her attitude since BIRTH. What's worse is that you doubted you're biological daughter that she's not yours like you literally birthed them and stupidly asked, "Is she my child?" Well YES, stupid!
I can't believe the duke married someone like you. You're parents must insist you to marry him in hopes for you to learn and be better but you just become nuisance in that household instead.
Like I have so much more to say. But all I can say is, if she even have a happy ending after all of this, I will isekai myself, tell her all of this above while torturing her, kill her and hope Serena won't kill me.