Obviously they already exist and looking at cooperatives like that they mitigate most of the problems of private enterprise at least somewhat. The argument I'm making is that Private companies (especially large ones) are extremely dangerous to any system that tries to be democratic and because of the danger they pose shouldn't exist at all. I mean look at how much of US government is just captured by private companies and what effect that has (had) on politics in the country and on it's foreign policy as well.

The lack of education and an informed public is not the cause of the problems, it's one of the many symptoms. It's not like Bezos bought WaPo for sport. It's not like de santis and trump get fossil super Pacs by accident. It's not like super Pacs exist because voters love companies throwing tons of money into political messaging....

This is what I mean with Private enterprise is dangerous to democracy

These side effects were written into every liberal governments constitution by Bourgeoisie to protect their wealth from before democracy even existed. Sure there always were some concessions made towards people that weren't wealthy but obviously it was always the wealthy who had the greatest influence.

I don't care what particularly replaces it but this system must be changed so much to get rid of these perverse incentives that it should probably be called something else too.

Marx obviously is a good way of analyzing these failings of liberalism but he certainly is not the be all end all. Did you know for example that North eastern Syria has a constitution actively building a direct democratic rule in the region Constitution and Principles . The principles are anarchist or libertarian socialist in nature and certainly address the issues you had in terms of state authority and rush toward corruption and monopolization.

Theory and even practice of socialism obviously doesn't stop at Soviet or CCP "communism".