I see the father is suffering. Good.
He thoroughly abandoned her in the last life. She did no evil but he actually let her get executed. She did no evil, not even anything selfish. She was a good person. All the years he spent with her wipes in an instant cause a new girl came. Even before the new girl came, he made her suffer, ignored her, thought nothing of her, and now that she's told (shown him) she is leaving him / wants to leave and get married he's like noooooo... pft, he is a failure.
If the author makes them both rekindle and he's forgiven, I'll be really disappointed. It encourages mistreating and neglecting children (which does a lot of psychological damage in the long run) and easily being forgiven being you share the same blood, which is not a good message to teach.
Even in fairy tales, there are messages that teach the good and the bad. I hope this manhwa doesn't teach something wrong.
If you live in a toxic environment, it is important to have the courage to escape and find happiness elsewhere. I hope our girl can do that. Because her father made her live in such a toxic way.