I think you often conflate and confuse American politics and economics with American culture.
Just like what conservative Catholic Matt Walsh asks in his superb documentary, "What is a Woman?", I similarly ask what is American culture today?
As for American politics, it is very clear what it is: maintenance of the US empire by subjugating its own people and that of other nations to the will and bidding of the ultrawealthy, Power Okole, and oligarchs that run it.
No other nation in history has uplifted as many people out of poverty and lead the entire world through conflict and prosperity as the USA.
I think you need to clarify this notion by time period as any objective historian can point out how the now US empire has not participated in those things you stated. In fact, through its illegal invasions and wars of aggression, color revolutions, staged coups, etc.it orchestrated throughout the 21st century, the US empire has been directly responsible for causing more poverty, chaos, economic turmoil particularly to those nations that did not bend to its imperial will.
For all the negatives, we are still the leaders of the free world.
That maybe were true after WWII; however, towards the end of the 20th century to the present, the only thing US empire is leading is its own citizenry and vassal states to economic and financial ruin with its fiat-based imperial printed toilet paper.
As the founders predicted, greed and corruption will continue to gain traction unless they are stopped. Hence the balance of powers design. Bad thing is, when all 3 branches become greedy and corrupt, it's up to the people to set it right. Too many rely on the justice system to stop these flagrant violations of law, ethics and morals, but we see that doesn't happen if you are part of the swamp (Clintons and Bidens are perfect examples).
Regardless, the system isn't broken. It's just been hijacked. We need to give it back to the owners (We the People).
That's not an easy task since the education system has cultivated a population of sheep, blindly following an ideology -- or worse yet, blindly hating any ideology that doesn't align with the one they were taught.
All the facts you presented actually proves that the system created by the Founding Fathers is broken beyond repair and that is why the former American Republic is now the US empire.
You mentioned all three branches of government have been corrupted presumedly by the ultrawealthy and America's oligarchs. Do you think their hold on power will ever cease?
You speak of Mainstreet Americans of needing to get back power over their country, but how can they do that when they do not directly control the economic means of production or the armed forces?
Finally, you speak of the educational system producing a population of sheep following some ideology. What ideology is that? Moreover, it's funny how you even mention how the educational system is training its students to blindly hate other ideologies that do not align to the one that is currently taught. I got news for you as this has been happening since WWII with all Americans being indoctrinated to despise and loath socialism/communism as well as the nations and peoples that believe and/or practice some form of it. If you were/are OK with that anti-socialism/communism brainwashing, is it not hypocritical of you to be upset with education's current ideological curriculum today?