What "both global regimes"?
Politics is not just Communism vs Capitalism - there is a massive range in politics which is obvious when one starts looking at various implementations of supposedly the same thing (both those under the "Communist" label and those under the "Capitalist" one) and it turns out they're doing vastly different things.
It's exactly that wholy artificial reductivism of politics to two "regimes" that ends up with American Hard Neoliberals thinking that Anarchists or other unaligned leftwing thinkers must be "Tankies" because they don't unquestionably accept Neoliberal dogma and whatever the DNC is pushing out today at the same time as Chinese CCP muppets think those very same people must be "Capitalist Pigs" because they don't just unquestionably accept CCP dogma and whatever their politicians are pushing out today.
It's exactly the reduction of it all down to Capitalist vs Communist, US vs China, Us vs Them that's the display of political ignorance I was pointing outr in my previous post - there is a ton of takes on what's best for Society and how best to get there, and many of those are square pegs that can't really be hammered into the round holes labelled "Communism" and "Capitalism" (or pro-America, pro-China, for those people who are Nationalists and like to see everything as nations).
So even "Denialism" (which is not at all the same as Skepticism) is only "a biased view towards one regime or another" if you start from the falacious position that there are only two "regimes" and deny all other ideas of what's best for society and how best to get there: that idea that not being for one "regime" implies being for the other is only "logical" if you start from the false axiom that there are two and only two possibilities, which in the broader Politics of the World isn't even close to reality.
That said, I can understand how people who grew up in Power Duopoly fake Democracies with only ever two viable "choices" have been trained their whole lives to see the entire universe of Politics as having only two options.