His so called monologue actually showed how his upbringing has been .... According to him he has fought physically with his sisters and parents never intervened! ... Ladka ladki besides the point but "physical aggression" should be condemned right when it happens .. Siblings fight but you also have to teach them you can't get physical with anyone regardless of ladka ladki!
His mentality shows how violence and aggression has never been condemned in his family hence he's the torch bearer of it! He's also not taught how to respect boundaries! ... To a point his parents are at fault but once you reach adulthood you have teach yourself from your surroundings and society where to draw the line and which issues should be dealt with sensitivity! But Alas, Kabir Singh brain!