This manhwa is great at demonstrating women's internalized misogyny tbh. Harsen and Ercella are both terrible parents, but the mother will be the one bearing the brunt of the blame because she is always the one expected to be emotionally connected to her child. A father providing for and educating the child isn't enough - he should also make an effort to be kind to the child. Ercella fucked up by abandoning her kid, but what's good is that she knows what she did was wrong and wants to correct her mistake. Harsen is acting so self-righteously just because he did the bare minimum of acknowledging his son. We often attack female characters that do this more than male characters, because being a distant father just seems to be more forgivable to more people.
Harsen treats his son like some robotic pet, Ercella abandoned her kid because of her postpartum depression... but we have to remember that they're both humans. Humans can be assholes, reckless, and selfish. They're both making mistakes but you shouldn't put down Ercella just because she's a woman. She's a flawed human being, just like Harsen, and that family is dysfunction as all hell. Vincente deserved better, but people don't always get what they deserve. If he has it in his heart to forgive his parents if they prove themselves to be on the path to...well being better parents, then good for him. It's already a miracle that he has a fairly healthy mental health state without have developed impostor syndrome or some sort of CPTSD.