Communism is a very doable system, the problem is that people have false expectations of it and what it should look like (largely thanks to Leninism).

Collaborative, democratic consensus, is the normal way that groups of people work. Coercion is not, but that is how majoritarian systems work, and it is how states work. People have been living under Western nation-state and administrative-state systems for so long, within defined borders that denote both behavior and identity, that it's tough for people to take how things work on a micro scale (e.g. family or friend-group dynamics), and apply that thinking at larger scales. The common response is, "but someone will always try to take charge/ seize power", and that is true, but before the time of the modern state, you could walk away.

Now the state itself has become a self-perpetuating threat to its own citizens (which you can't leave without subsuming yourself to another state), and majoritarian democracy is just used to maintain the state through the illusion of choices that hold that threat at bay. "Don't let 'x' get in power, because if they do they'll hurt those of us that are 'y'." You can't fuck off and make a community that doesn't allow 'x', because a state will come along and destroy or seize it.