The fact that this is a permanent uphill struggle for humans has long been understood. It is becoming a higher and steeper hill with complexity required of a larger portion of the population.
The American experiment was based on an evolving and active citizenry. Authoritarian corruption requires the exact opposite, a distracted, ignorant, and manipulated population.
That is a lot easier to sell, just believe and do what you are told, than the active citizenship that requires constant work. It appears that those preferring to be told what to do are a large enough percentage of the population to destroy it for the slight majority that sees the dangers and is willing to accept the responsibility to act rationally.
I don’t think this can be changed quickly but that is what is needed.