Have you heard about Stalin? Where was he from?
Moscow.
Hitler was from Austria, but he still ran things from Berlin. And Berlin is where the power structure was, and still is.
It's always more than one man, even if the man is a dictator. The dictator is just the one who survives the power structures environment in a way to be 'the top'. And that power structure exists in a place.
The vast, vast majority of everything that actually happens under a power structure is done by everyone who ISN'T the dictator. And those folks don't just disappear when the dictator dies.
As to if a countries power structure represents a people or not, meh. It always says it does, and it draws resources, taxes, and conscripts from them. So regardless of any individuals take on if they are 'represented' or how that power is acquired, 'it is the people' near as I can tell.
And many of them are happy to murder anyone who says otherwise to prove it.
And just because it has to be pointed out, Stalin didn't do his reign of terror from the Kremlin in Moscow, but from his dacha in Kuntsevo.
Hitler also spent most of his reign of terror from Wolfsschanze and Obersalzberg. He definitely had his own power structure, completely independent of the city of Berlin.
And Kuntsevo is in Moscow. Literally.
And if you’re asserting that Hitler didn’t need, or use, the Wehrmacht or other organs of state power (including the Gestapo, which was consolidated out of the prior Prussian Secret Police), and didn’t spend most of his time in Berlin, then I don’t know what to say.