The Dark Brotherhood Quest in Skyrim

I was disappointed in the dark brotherhood quest in Skyrim when I killed the emperor and they didn't bother to name me emperor. Some people used to argue too that because what was his name? The Hulfric? No, the guy in oblivion that turned into the Martin septum. If that he was technically dragonborn, most of the septum's were should have been, I believe, because they are dragon blooded. They just never bothered to travel north. Which I don't know like, oh, there was no dragon souls for them to absorb either. Well, I mean, like they were just like inherently like more the natural dragonborn,. whereas like you