Kruschev should never have been in the position. I think it was the missile crisis that closed the door on his premiership.
He was the guy who oversaw the starvation of the Ukraine in the thirties. Lots of grain harvested, little distributed to the Ukrainians. About 7.5 million died. Just a management technique.
And as I pointed out, the only reason Crimea was part of Ukraine, was that Khrushchev transferred it from the Russian SSR to the Ukrainian SSR to try to win over the Ukrainians, when he was still vying to replace Stalin. At that time it was a meaningless gesture because Moscow was still calling the shots.