How about having some spine and not giving a fuck about your familys approval?
(Especially since all they've done is shit on you before that)
When your father is such an idiot, then his comments/judging shouldn't matter anything to our protagonist.
I'm still pretty disappointed at this manhwas plot, since right the moment our mc is able to make a decent income, his deus-ex debt creator dad jumps on the stage to nullify mc's success, so that we're in even deeper hole than before..