First of all Tae never felt jealous over Jae that he is talented. Tae loves his hyung. And both Jae and Uncle really loves Tae and wants to protect him. There was a chapter in novel where Ilay says, Tae is simple but rare. He is the G** of luck but he doesn’t have any ego on this. Rather he is a good human being with a clear mind. You can see in UNHRDO almost everyone is crazy. Ilay then says now I understand why Jang Chang il (uncle) and Jayui loves Tae so much. There comes a time when Tae dislikes his uncle for some reason. And the uncle feels trouble that his precious nephew dislikes him but he tells Ilay that whatever happens Taeui will never leave me because we are family.