Am I right on Khrushchev? - eviltoast

u/Radiant_Ad_1851 - originally from r/GenZhou
I need to get some facts straight for something coming up.

So, what I remember is that Khrushchev is blamed as the catalyst for the fall of the Soviet Union(in Marxist Leninist circles) mainly because

A.He reintroduced the anarchy of production when it was sorely unneeded, allowing things like the Brezhnev Stagnation to happen

B.Removed the dictatorship of the proletariat, which allowed for a new class of people to own the means of production, which then incentivized the reintroduction of the capitalist system like we saw in 1991.

C.The secret speech that caused some party members like Gorbachev and Yeltsin to be completely dissolutions with Communism

I know this is a vast oversimplification, but is this basic line of thought correct, am I going in the complete wrong direction, or am I just forgetting a few things?

Edit:Where in the hell did I get this information from?!