Because we live in this unfairly world?
Who doesn't want beauty anyway?
I don't believe it if you say you don't.
In this world where beauty is the standard, that would really be the normal.
Do you think reader will be interested if the protagonist doesn't have good looks?
Of course the author should write catchy story and that is part of it.
You just need to accept it dude and move one. ahahahah
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I haven't read novel where the guy is abusive.
Yeah maybe he is cruel, overbearing, cold, arrogant but hitting girls is another story.
Some of the girls don't only want those romantic guys with flowery words but they also got attracted to those type of guys (abusive: X).
There are many types of people and some of them is what we call tsundere where they are shy to express their true feelings and do violently instead to cover up their true feelings.
Ahhahahahahh. watever. The end.