As other commenters have pointed out, the terms socialism and capitalism are very broad. However, the fact that small business and entrepreneurs are viewed positively and big business is viewed negatively (at least by Democrats), suggests that people are primarily upset about corporate capitalism and want a form of socialism that addresses it.

The fact that both big business and the federal government are both viewed negatively suggests that American socialists are concerned about the power and negative impact of corporations but, contrary to what conservatives tend to assert, don't want a centralized system run by the federal government. I wonder if policies could be developed that are tailored to this specific approach to socialism?