“Punching left” just means antagonizing Socialists. It isn’t about arbitrary spatial coordinates, but is a commonly understood shorthand.

Secondly, systems do not allow themselves to be changed. Feudalism wasn’t voted away, nor is Capitalism. There’s frequently controlled opposition giving the illusion of choice, when no such choice exists in reality. This is a fact that has been understood for centuries.

I don’t think the case that viewpoints like fascism should be allowed makes any sense, and taking the USSR’s example, liberalization killed 7 million people that would not have died otherwise. Rather, if we take Marx’s analysis, centralization of industry and production is inevitable as it advances, ergo it should be democratized as it centralizes. Decentralization doesn’t mean democratization, such analysis would mean Capitalism is more democratic. In reality, centralization and decentralization have nothing to do with how democratic a system is, just how it can be democratized.

As for Marxism-Leninism, you can oppose it without drawing equivalence to the Nazis. Doing as such originated as a form of Nazi apologia and Holocaust minimization, also known as Double Genocide Theory. You likely aren’t intentionally doing that, but the fact remains that this is the origin of such equivalences. Moreover, the bodycount of Western European countries and the US is far higher to begin with, History has been more kind to AES than it has to Capitalism.

I encourage you to read the book I linked.