How? He's realistically portraying the grief Sasuke's family is going through because of him. You can't call someone a shitty writer because they make a character too controversial for your liking.I agree. The hell is Sasuke doing? What does Kishi want with Sakura? And Karin?
Is Kishi trying to portray them as shitty characters or is he just an idiot? Either way makes him a shitty writer.