> For example, in your world, as long as enough people agree with me, I can decide that the couch in your living room should actually be in the kitchen. After all, one of the most widespread place in the world is your housing and in todays world it’s fundamentally undemocratic
You should learn about the difference between personal property and private property.
Having democratic control of what's currently private, non-personal property has clear benefits to society which obviously don't apply to personal property. Arguing that people would want to encroach on your rights to enjoy personal property is a big strawman.
> You start a business, hire 2 people to help you out, and suddenly they can democratically take over the entire company?
How to get from our current situation A, to our democratic utopia B is of course not something that we can make justice to in a brief comment, but:
Instead of thinking "hire 2 people", if you need support of more workers think: "cooperative"
If instead of support from more workers what you need is capital investment for the public good, think of partial state-ownership in your enterprise (which would be a mean to ensure oversight and making sure that funds are not wasted... Which should already be the case when we talk about subsidies and state grants in our society)