Leftism

I'll address what you said in a moment, but I really do think you should read theory. If nihilism is overtaking you, in my opinion that means you have likely not properly analyzed our conditions, nor how to fix them. I keep an "introduction to Marxist theory" reading list I can link if you want.

First, no Communist is "Utopian." Utopianism refers to the strategy of trying to figure out the right formula and directly create it, rather than analyzing existing structures and where they are headed. Communists analyze Capitalism and advocate for Socialism because Capitalism creates the conditions for Socicalism naturally, over time, by forming monopolies that can be folded into the public sector and centrally planned.

Secondly, you are making a critical misunderstanding of Communism. Communism is fully publicly owned and centrally planned. This is the entire purpose of public ownership, once you have public ownership you can plan things centrally, along democratic lines.

Thirdly, human values and thinking is guided by their social relations and material conditions. In Capitalism, a highly individualistic system filled with competition, these values are expressed at greater levels among Capital Owners. However, as it centralizes, the working class becomes more associated, and communal values are expressed at greater levels. This process has been reflected throughout all of history, from the tight-knit family structure of Feudalism to the modern era, the Mode of Production has formed the Base of society, and influenced the laws, culture, art, and so forth forming the Superstructure that reinforces the base, in a cycle that continues to evolve over time as one Mode of Production slowly leads to the next.

As per your "Democratic Socialism," you are describing "Social Democracy." There is nothing Socialist about what you described, a Capitalist state with large safety nets is Capitalist regardless. As such, you retain the inherent unsustainability of Capitalism and the further rising disparity it contains, until it is eventually overthrown and Socialism is achieved.

Regarding people's receptions to ideas, this gets back to the Base and Superstructure argument. As the Base shifts over time, people become accepting of new ideas and values. Focusing on literacy and organizing are the best ways to increase social awareness of systemic issues, and figuring out how to solve them.

I maintain that you should read theory. I can offer a reading list, or answer any questions you might have. I don't think it's fair for you to denounce Communism as impossible if you haven't engaged with the literature enough to fully understand what it even is, or how Communists want to achieve it and why they believe it not only to be possible, but necessary.