In theory yes. In reality all socialist systems had surprisingly few changes of leadership after one guy rose to power of the “socialist” movement or party

There are numerous reasons for this. Stability in protecting revolution and genuine popular support are among the larger and more important reasons.

And they don’t really seem to trust their citizens to be socialist without a lot of fear, censorship, spying, silencing critics…

Neither are Capitalist states, and neither was Marx. Combatting international Capitalist influence was and is key for retaining Socialism.

It’s almost as if the majority of humans reject socialism. Which is weird but true.

Not true at all, actually. Those controlling the media want you to think it though.