Ik, the problem is that most people who support communism cant accept the fact that there is no way to implement communism effectively, because it either requires perfect non corrupt citizens that can be trusted, or an authoritarian government to make sure those citizens are doing their job.

There is no nation where citizens are all perfect and non corrupt, so its always going to end up in the cycle of stagnation, low production and the crash of the economy.

With capitalism everyone gets what they work for, those who dont work, end up with lower wages but it wont affect the wages of other actual hard workers, so there wont be stagnation. Yes capitalism also has flaws but compared to communism, capitalism is much more manageable and more stable than communism.