A lot of Mao Zedong's policies are viewed as mistakes by the Party, including the Great Leap Forward and Cultural Revolution. Heck, Mao himself publicly admitted that the GLF was a mistake for which he takes responsibility.
Yet the CPC, as an organization of millions of individuals, didn't implode and remains as formidable as ever.
There are a lot of reasons for this, not least China having 5000 years experience with running civilization-scale groups.