Reform and opening up has always been controversial up to this day, but it doesn't stop there, market economy, One Country Two Systems, supporting private enterprises, not meddling in the internal affairs of other countries, largest trading partner of the US, all used as evidence by different people to call the CPC "revisionist"/"class traitor".
History has no ifs or buts, the Cultural Revolution has shown that those who claim to be Maoists could not defend their ideals, even from within a socialist country, this is a disgrace to Mao whose banner they hold high. High respect for Mao is one thing, but using said respect to lure people into a cult of Mao is what some people are doing now in China to erode the legitimacy of the CPC.
Maybe there was another path, maybe not, doesn't matter now to China, and other countries should definitely learn from the lessons and mistakes of the CPC. Turns out that running a country isn't as easy as what people imagine, and the dictatorship of the proletariat isn't easy when you have to worry about underdevelopment, poverty, corruption, global imperialists, the list goes on.
Theory is nice and all, but it only matters when you put it into practice, that's why Marxism is scientific socialism, and that's what kept the CPC going for 102 years. If you don't hold the reins, nothing else will matter, and any ideals you'd want to protect won't be worth a damn.
Two people in this thread say that with the internet, we can move away from "big public figures"/"big thinkers". While I appreciate this optimism, it just sounds very anti-authoritarian, and I quote from Engels On Authority:
There are anti-government and anti-"big corp/business" tendencies in the US/West, which I will call "anti-authority" for now. The essense of "anti-authority" in capitalist countries is anti-capitalism, or anti-"dictatorship of the bourgeoisie", but there is a gap in this logic that stops people from turning into marxists right away, as they might instead become anarchists. This gap in logic will not be closed just by having everyone have access to free information through the internet, as there is too much information to digest, and imperialists will also interfere with the propagation of marxist ideology.
"Anti-authoritarian" sentiments do have positive outcomes, like decentralized technologies (think internet, bittorrent, p2p, fediverse etc.), the open source software movement, but these only serve as tools, they are the means and not the end.