Capitalism is in essence anti-feudalism.
Capitalism is in essence
neo-feudalism. Sure, it did away with the old historical system, but replaced it with another one that shares many of the same principles. All the defining features that you can list of feudalism have their respective expression within capitalism.
very aspect of capitalism that seems bad is usually capitalism infected by socialism
This is the "bid bad wolf" that is used to scare the ignorant voters, especially in places like the USA. Every single government in the world runs some form of socialism as part of the system of public or collective programs. In many cases its things like allowing the strong labor unions, free post secondary education, free healthcare, retirement plans, access to funds if one is out of work, the kinds of economic help available to the poor, sick, etc. In many other cases it is the system of taxation that pays for things like roads and infrastructure, public parks, and so on. Within the American system (just using that for now because it is a good example), the peak of socialism in the USA was during the years of high taxation of the wealthy and strong labor unions that created the economic powerhouse that people still have nostalgia towards. It was that era when a single working father in a factory earned enough to buy a nice house, a car, support the whole family, and they could go on small vacations every year. That all ended with the economic shifts that were started by the series of deregulations that ultimately culminated in most of their production being offshored. In the USA, capitalism killed the middle class, because the capitalists ended up having enough political power to change wide ranging policies.
Nothing is more dangerous and disgusting than communism… and that’s how commies speak.
I would argue that ignorance of different ideologies is a more dangerous thing, and sticking to a favorite ideology that one defends makes one simply a pawn or dupe of that system. There are problems with all ideologies, because none of them are put into practice in a perfect way. That is why we call them ideologies. They are philosophical constructs.
Whenever someone uses the term capitalist as a slur and grouping it with fascism, then the entire argument falls apart.
One final note. What if capitalism is actually in fact, in many cases, acting in a fascist way? This has nothing to do with what one likes, what system one thinks is best, but an honest dispassionate view of things.
Some tell tale signs of capitalistic societies becoming more and more fascist are things like the destruction of the previous labor force, such as the breaking up of unions, offshoring jobs, purposely keeping minimum wages low, banning strikes, or using cheaper labor (imported immigrants, illegal aliens). Another example is the regulatory capture, where the leaders of industry are now in positions of political power, so they are able to set governmental policies that are designed to personally benefit their own industry, such as enacting bailouts and favoritism for their own industry, or allowing them to continue existing in a monopoly. The expansion of the military industrial complex, and expansion of the surveillance state is also a sign of increased fascism.
One can see that fascism is, in essence, the movement towards removing those elements within a society that were originally sourced from socialist movements or ideologies.
The political spectrum is not merely binary - it is not merely right and left, (as defined by classical socialism on the left and capitalism on the right), but also has a vertical axis, defined by increasing authoritarianism in one dirrection, and increasing anarchism in the other. Within this plane one can find various ideological islands. Fascism is a movement towards more authoritarianism, regardless whether the ideology one is speaking of is on the right or left side of the spectrum. That is to say, both pure socialism and pure capitalism have the capacity to move towards fascism, it is not a mutually exclusive phenomenon.
Corporate autocracy, which, for example, is a system of government that can be used to describe some capitalistic societies, such as the USA, is authoritarian in nature, thus fascist. The whole of Reaganism was authoritarian. Right wing "laissez-faire" capitalism is closer to anarchism or anarchro-capitalism. Fiscal conservatives are more authoritarian and fascist than Neo-Liberals.
Here is a political compass test - 25 or so questions show where you land on the scale:
https://www.politicalcompass.org/
It's helpful to understand what amounts of each of the different ideologies you actually believe in.