LARPer Cat's rant didn't go over well, though I wonder whether those retorting might have included moles.
1. Star Member Hugh_Lebowski pointed out the chronic shortages of the USSR. "He" could have pointed out that this is a characteristic of Communism, and lead to mass starvation in the USSR (Holodomor, famine under Khrushchev), China (Great Leap Forward), and Ethiopia, and to severe shortages in Venezuela and now Cuba (just of the top of my head).
2. Communism also was and is a prison camp system of government which had to suppress differing ideas through gulags, "reeducation camps", and the like. The gulags were not peculiarly Stalinist in the USSR (begun by Lenin and continued by Khrushchev and his successors), and were not peculiar to the USSR.
3. LARPer Cat doesn't get that, under Socialism - whether Marxian or non-Marxian, such as Nazi Germany - the "means of production" are controlled by the state. Thus workers' "rights" are as few or none as suits the state's purposes and bureaucrats' tyrannic caprices. Worker safety is reduced to whatever minimum doesn't interfere with quota fulfillment. Environmental concerns, as demonstrated in the USSR, Eastern Europe, and China are all but non-existent.
4. Contrary to the internationalist image the USSR and China have created, both were and are racist/ethnicist. In Stalinist Russia the top tiers were Russians and Georgians (Stalin was Georgian). In modern China, Han Chinese are the top tier, and ethnic minorities in the lessers-oppressed spectrum.
5. mahatmakanejeeves hit a nail on the head. Everything LARPer Cat uses and enjoys is a product of a capitalist system. Communism stifles food production and innovation.
6. Star Member Hugh_Lebowski hit the nail, though not squarely on the head, with, "Personally I think the fact there's no cap on GREED that's much more the problem." Greed is a human problem. It may express itself somewhat differently under socialism and capitalism, but it is a problem in all economic and governance systems. The problem is less in the economic system and entirely in the humans who design and operate an economic system. In plainer words, this human problem is called SIN. LARPer Cat's lifestyle is a rejection of the facts of sin and being accountable to a Creator.