it usually stems from the fact that they brought superior technology and civilization

South Africa transformed into a 3rd world warzone overnight.

Meanwhile, everyone wants to live in Japan so badly, that Japan has to put harsh limits on immigration so as to not lose their own country.

Human health and environmentalism have declined significantly since WW2.

But overall, the real reason for why the Allies winning WW2 is such a disaster, is because all our worst fears finally came true. The topic of "racial identity" has been completely censored and subdued,

These are false statements. Though I appreciate that this is a debate sub, and that I should offer an argument and evidence in response to these interesting points, it would take an hour to write up a proper response, and I don't have an hour, nor do I think anyone really wants to read my arguments. But for what it's worth, here are a couple of concerns:

OP's argument could be addressed thoughtfully, and there are a number of books on it, though the factual errors would have to be removed from the argument in order for it to be an informative approach.

Authoritarian regimes like that in Germany and Japan also existed in previous centuries, and one could compare portions of those regimes to see what they might like about each, or especially what they might not like. In modern history, the French Revolution substantially changed Western public perception about the way they could deal with authoritarian oppression. As for China, however, there has always been some form of authoritarian leadership in that region. Indeed, it's argued that they've not been as competitive with the West militaristically because of their authoritarian abuses and lack of initiative to innovate (until recently). German fascism, much like Italian fascism, was a mass worker program (regardless of what one sees in documentaries that focus so much on other problems of fascism), meant to develop national interests. Hardly anyone in that form of society had any freedom to speak of. They were all worker bees. This was the same for Imperial Japan, and today, working conditions for the Japanese are brutal, though they put up with it. What people seem to forget is that post-war US was remarkably successful because young people could get home loans, decent jobs sufficient for the man of the house (and some women, but not by much), and the benefits of the New Deal enacted a few years earlier, along with industrialization, favorable trade with other countries and so much more made the US the richest in the world for decades. Isenhower Conservatism also helped, though it was not 'progressive'. Since the early 1980s, that balancing act between Democrats and Republicans has come to a screeching halt, now with money in politics. There are some Democrats who are however working for the 99%. If Germany had won the war, and if that authoritarianism had continued, life in much of Europe would have been much like that in China today. If however Germany and Japan defeated Russia, England, Canada, and the US abroad, they'd still would have had to invade the US, England and the rest of Russia in order to maintain government leadership. It would have been a bloodbath and would not have succeeded very well if at all. Military conflicts are won with logistical strategy, much more than with "superior technology and civilization." Germany and Japan could never have won in the long term, thanks especially to Russia and the US. Moreover, authoritarian regimes don't work in the long term. They're weak. Democracies are strong, if we want to consider what has more power, united we stand, and all that.