If you let a good piece of food rot, you can't fix the rotten food, you just have to replace it. Same with culture, a rotten culture can't be fixed, it has to be replaced.
Modern American culture is rotten, so it can't be fixed, it has to be replaced. So to make America great again, exterminate all modern Americans and leave the traditional Anabaptists and people who reject modern culture to replace them. Traditional Anabaptists are much closer to Americans from 200 years ago than modern Americans are. So this is the only way to make America great again.
Your rotten food analogy seems reasonable enough, though this whole concept of supposedly making America great again is just fucking ridiculous.
200 years ago, as a nation, incipient America was, at best, barely a step up from the average worldwide standard, and in fact borrowed most of the founding principles from those already existing in numerous other countries.
The problem with modern American culture, same as all modern cultures, is the cartoonish fact that the majority idolize and worship complete morons and professional bullshitters who merely speak the loudest with confidence.
Modern America, like every other country, is primarily a collective of overwhelmingly ignorant tribalistic mobs, each absolutely convinced of their own imaginary superiority, and all of them fighting for dominance over the rest, with the ultimate goal not being the betterment of the nation, but simply to impose one mob's fanciful dysfunctional ideologies over the others.
Modern American culture, like the others, if merged into a single person, could accurately be described as a highly intelligent and materially capable yet severely maladapted, dysfunctional, utterly incompetent, delusional narcissistic buffoon who believes themself inherently infallible simply due to their existing.
If a core principle of America is the concept of independence, then why is it that most modern Americans seem entirely oblivious to the meaning of the word.