Lack of acceptance for what? Leftism is a group of ideologies, and not necessarily one built around tolerating that which they oppose out of a sense of moral superiority.

I was just asking for what you've seen that points to Communism working in theory and not in practice, because so far you've explained exactly none of that.

I've found a good start for your lack of understanding, though! You completely misinterpret the definition and conflate private property with all property, when it is specifically referring to tools and industry, ie the Means of Production. You absolutely own things in Communism, like your house, toys, games, books, etc. You just don't own Private Property, like factories, restaurants, etc. The definition of Communism is a Stateless, Classless, Moneyless society, and you make the error of pretending to know what exactly that entails by your own worst imagining of your own worst interpretation of said phrase.

Your next paragraph is also very enlightening, you assume Capitalist Mode of Production with Communist consequences! This is precisely what I'm getting at, you believe things like Companies would exist in Communism, when Communism itself is anti-market, and you're again making the assumption that we can just turn on the big red Communism button and get there, when it must be built over a long period of time, with structures such as worker councils.

Your question about bullshit jobs has numerous solutions, actually. First of all, you're assuming Communism in modern society, rather than the future, after lots of automation. Socialism would have monetary rewards, even lower stage Communism as well, for performing this labor. Eventually, it would be like your current life. Who cleans your house? You and your roommates, whether that be your friends, or family. In a Communist society, likely everyone would take turns, for whatever bullshit jobs haven't already been automated away. In lower stages, they would be paid more money until this becomes possible.

Your points on the USSR and China are also wrong. In the USSR, wealth inequality was magnitudes lower than it is in their current oligarchic hellscape, and the Workers actually had a lot of say over how their life went, assuming they didn't criticize the Politburo. This was referred to as Soviet Democracy, by which worker councils called Soviets decided things democratically at the local level.

No, I wouldn't live in the USSR or modern day China, because they are developing countries with authoritarian leadership. However, you'll find that is true across the board for developing countries. Perhaps if the USSR or China ever fully developed and became more democratically accountable, I would choose to live there, but for now you'll find that quality of life follows development more than structure.

Both Maoist China and the USSR had far less wealth inequality than they have today, both doubled life expectancy, and the USSR had close to 0 homelessness with fully free education and Healthcare. They also lacked luxury goods and had an Authoritarian party controlling the state, but you're demonstrably wrong about wealth inequality.

I am not a tankie or a supporter of the ML form of Socialism, if it needs to be restated.

If I point to Hitler's Germany, Pinochet's Chile, and Batista's Cuba, does that mean that Capitalism is great in theory and doesn't actually work in reality because it results in Authoritarianism? The answer is that you must state the why and how this came to be, so as not to repeat it.

Do you genuinely think the USSR and China are the only forms of Socialism that could ever exist?

Please, just read some leftist theory or watch some YouTube videos. All of your false preconceptions are easily debunked even by looking at historical records and doing some light critical thinking. I know you mean well, but you could genuinely have improvements in your understanding.