1. When global trends are considered, China is not on the decline. Communist China - lead by the Chinese Communist Party - is the second most powerful nation in the world, arguably already the most powerful, with American soft power diminishing since GWB's disastrous tenure. In that sense, Communism would seem far from dead.
1a. On the other hand, it could be said that communism was stillborn. It has never been implemented. In Communism, the leaders aren't supposed to be worshipped or considered superior. They should not have a single cent more than the peasant. If the peasants live in huts, then so should the leaders. However, the leaders have palaces. So-called communism - now lead by Supreme Leader Xi and Tsar Putin - has always been is just a monarchy with a rationale to keep people quiet.
2. Claims about women taking over and men being subjugated are absurd and off-topic. There's a lot of angst in the media about young men, as though they are being railroaded by young women. This is not true.
The actual situation is that the old are crushing the hopes of young. It is mostly the older men who are firmly holding the reigns of power. (Is Kamala Harris still alive? Her ghost can be heard echoing in White House halls after dark).
Both young men and young women are having their hopes crushed by Boomers and Gen X. It's true that young women are doing better than young men, but they are also struggling, increasingly pushed into prostitution to pay student loans and other debts. And none of them can afford a house.
Media barons like Murdoch have been most responsible for the policies that have destroyed the hopes of young people, and they have been successful in deflecting the blame for young men's troubles on to women. Divide and rule.
What went wrong with Communism? It never got started. Like libertarianism, it's theoretical but will never be properly implemented because humans don't operate by theory. They want a balance of security and freedom, not absolutes. As for the optimal balance, that depends on place and time - environment and culture - and these things are dynamic. Thus, any ideology "set in stone" will cause more harm than good, hence the increasing toxicity of religions around the world. Societies need to be flexible and adaptive in rapidly changing global circumstances, and ideology just acts as a millstone.