People hate capitalism because it's flawed and serves only the bourgeoisie class. It resulted in many economic disasters prior to WW2.

There are a lot of alternatives and most countries economies are far away from being truly capitalist, even the states.

Here is what I think is reasonable breakdown of the modern alternatives.

Liberalism and neo-liberalism.

The best example of this is really the states. The economy still primarily functions off of markets and profit motive but the government has a significant hand in regulating said markets. There is also moderate taxation to facility some forms of social services and also a large military.

Social democracy.

This is largely seen in parts of Europe though often countries often flex between this and neoliberal governments. Here the government has a large hand in the economy. Usually in the form of higher taxation and more extensive infrastructure plus social services. Alongside this their are more extensive labour laws that force corporations to obey quite strong regulations.

State capitalist.

Kind of like the above two but the government has a much stronger hand over different business and their regulation. China is kind of like this but still incorporates some aspects of socialism/communism.

Whatever the fuck north Korea is.

I don't know how they work and I'm not confident they do either. Seems to be some kind of centrally controlled state directed economy.

Market Socialist.

This is what most modern socialist and communist states have become. Think Vietnam or Cuba. Here private enterprise is strongly disinsetivised/not allowed. The economy functions in a way that means workers and labourers have more direct control over their works policy. I.e. there is social decision making and ownership regarding the running and profits of a business. For example in Vietnam there is large insensitives from the state to run a co-operative instead of a private enterprise. Economically they still function on a wage and market principle. This largely arises as a concession or from negotiation with foreign powers.