what is up with this scumbag dad always appearing in manhwa?

i think its because parents who are abusers are the most complicated people to deal with. notice how in each scenario the kid always obeys and goes along their parents' comands even if they said they would cut them off... thats an unfortunate effect people like that have on their kids, they abuse you since day 0 and thats all you know about life and about parental love, they make you think its how its supposed to be and to be gratefull for it and you end up conflicting yourself your whole life unfortunatelly. thats why its such a popular trope to put in stories, then the reader will most likely be able to see the child break free from the parent and the feeling would be extraordinary