In capitalism, economic power is distributed by the free market. Successful small business owners outcompete other small business owners and become big business owners, while the rest go bankrupt. Those big businesses compete with each other, and some come to dominate the country while others close up shop. Capitalism therefore creates a very pronounced hierarchy of economic power.
In democracy, political power is allocated to all citizens, equally.
Over time as money pools in fewer and fewer hands by the aforementioned process, companies run out of room in their respective markets to compete over, and they run out of options for innovation as technologies mature. In order to continue making profit increase -- and they must always increase -- the companies have no choice except to compensate employees less, work their people harder, and set prices higher. At the same time, companies start using their vast economic power to buy political power. They buy off the media and the politicians to do stuff like gut environmental regulations, lower taxes, and strip away worker's rights.
Regular workers get upset over this, and they try to use their political power to restrict the economic power of the corporations. The corporations and the political apparatus they've built redirect this anger against racial minorities, immigrants, women, and people they view as sexual deviants. Thus, Conservatism is born.
This creates a distraction for some portion of the population, but this strategy on their part creates natural divisions. They alienate all those demographic groups they're using as a scapegoat (as well as anyone who's not dumb enough to fall for that bullshit), who then go on to form the opposition to that ruling elite. These disaffected power minorities back politicians who they see as amenable to their interests, but politicians need funding and the main benefactors available are the same companies they're supposed to be against. Thus, these nominally opposition politicians, the Liberals in government, have to either compromise between their donors and their constituents or simply lie to the latter.
As time goes on, the Conservative party instills bigotry as a value in its constituents through their messaging, and they attract people who are more interested in acting out bigotry for its own sake than in simply using bigotry as cover to protect the interests of the wealthy. When this happens, rhetoric reaches a fever pitch and a fascist movement is born. Liberal politicians try to fight back against this, but they can't because they can't acknowledge the reason why all of this is happening in the first place and address it at its source. To do so would be to indict their own ideology and admit some measure of complicity. They can't actually uproot a fascist movement because doing so would require taking actions that their donors would not accept.
I don't hate Liberal voters, to be clear. In fact, there's a world of difference between Liberals and the people they vote into office; the former are good and decent human beings and the latter are generally ghouls in human skin. I think most -- though not all -- of the hate leftists direct towards Liberals is directed towards two-faced corporatist politicians such as Harris & Schumer, not average proletarian Liberals. But if you're willing to consider the Republicans at this point despite seeing how bad MAGA is, that kinda tells me that you maybe don't understand why MAGA arose in the first place and will therefore be impotent to actually stop it. It's sort of like being in favor of a leaky pipe in your bathroom but against the flooding and mold that it causes.
And just tangentially... if someone tells you they've "read Stalin," you can disregard them right there. Marx was an accomplished economist and political theorist. Stalin was just some delusional freak who seized power over his country and immediately ran it into the ground.
