The USSR was a flawed form of Socialism, but was fundamentally Socialist. The majority of the economy was run by Worker Soviets, in a process called Soviet Democracy. The Politburo, ie the highest Soviet, had a massive amount of influence and power, but day to day decisions were made locally. I would agree, I don't think it was a particularly good form of Socialism, but I would still consider it Socialist.
Modern Russia is absolutely Capitalist at its core, that's the entire foundation of the Russian Federation. The Capitalists are the Oligarchs! The Inner Circle are Capitalists! just because it's a higher stage of Capitalism doesn't mean it ceases to be Capitalism.
The USSR was a flawed form of Socialism, but was fundamentally Socialist
Was the rule of law strong enough that decisions were being made by the people, or were they being made by authoritarians? Because if key decisions weren't being made by the people, it wasn't socialist.
Capitalists can do that as well, without being feudalists. You're tying an ancient peasant-aristocrat structure to modern Capitalism just to avoid acknowledging that Capitalism has failed Russia.
It has everything to do with Capitalism. When the USSR collapsed and the Russian Federation came into place, Capitalists got much of the Capital, and are now the "oligarchs."