Are all branches of the US government becoming corrupt?

Finland has a somewhat similar system of "separation of powers" as the United States.

The highest governmental authority in the country is the Parliament, which consists of 200 elected representatives. No law can be passed without the Parliament's agreement and majority vote. (This also includes enacting exceptional emergency laws which are not part of the normal function of government and which may temporarily reduce some citizen rights. The Covid-19 lockdowns are by far the most prominent example of this. It required the approval of the Parliament, which approved it unamimously.) This is kind of the legislative branch of the government.

Then there's the Cabinet, which is kind of the "executive branch", which consists of the Prime Minister and various ministers elected into several offices of the government. (It's not completely clear to me whether the President officially belongs to the Cabinet or not.) Its role is to enact and enforce the laws passed by the Parliament.

Then there's a "judicial branch" which has, among other people, an "attorney general" (and several other people who can act in the same role as needed). One of the roles of the attorney general is to monitor the legality of the law proposals being discussed in Parliament, as well as the decrees given by and actions of the President and the Cabinet. There's also a constitutional committee that monitors the constitutionality of law proposals.

It is my understanding that the constitutional committee has the power to veto (or at the very least raise an official objection to) any law proposals that it deems unconstitutional. The attorney general (or the few other people who can act on his behalf) has theoretically the right to act if the President or the rest of the government engage in illegal activities and ignore the warnings given to them, if the Parliament fails to act on these warnings. (As far as I know, this has never been needed during the history of the independent Finland.)

Also, the President has the constitutional right to terminate the current Parliament and prematurely organize a new Parliamentary election. (Prior to 1991 the President could do this whenever he wanted, for whatever reason he wanted. After 1991 he can only do this with the consent of the Prime Minister.)

While there's a good amount of "checks and balances" in Finnish government, I have sometimes wondered: What happens if all the branches of the government decide in unison to engage in an illegal activity, or pass unconstitutional laws or decrees? What if the Parliament, the Cabinet and the President all collude in doing something illegal, and the judiciary branch fails to act to stop it? What exactly is the next step? Should the police forces or the military step in (which technically speaking would be insurrection and sedition)? What if the police does nothing (because it's "not their business") and the military also stays out of it (because, likewise, it's "not their business")? What happens then?

I am now wondering if something like this is, at some level, actually happening right now in the United States.

When in the summer of last year far-leftist activists committed acts of political violence against people and government buildings in Portland every single day for over two months straight, the FBI did not investigate, did not try to find out who the culprits are, and almost no arrests were made. On the contrary, the political violence was deliberately allowed to continue for over two months straight without any impediment and, most obnoxiously, when the President of the United States mandated federal police to do something about it, the response from the local government as well as much of the federal government was one of complete opposition.

Likewise when in the summer of last year far-leftist activists marched in Washington DC to the White House and engaged in violent protest, prompting the Secret Service to take the President to the safety bunker below the building... no investigations, no arrests, nothing. The FBI did not investigate (as far as we know), nobody investigated, almost nobody of the culprits were arrested.

And those are just two examples of literally hundreds of similar events from the past four years. The story is always the same. In the most egregious examples the city mayor and the chief of police ordered police officers to stay away from a massive public brawl between left-wing and right-wing activists, and allow it to happen without intervention. As far as I know, nobody was arrested regardless of the egregious serious violation of several laws.

When the President and several members of Congress tried to sue several states for voting irregularities during the presidential campaign, the federal courts quickly dismissed all of the lawsuits and refused to investigate. The FBI likewise refused to investigate. The FBI seemed to be completely unwilling to even check if there might have possibly been some irregularities.

Recently a lengthy article was posted in a major newspaper pretty much laying out how a cabal of leftist activists and corporations had meddled with the election to ensure Biden's victory, even including threatening officials with riots if Trump were to win the election again. The article was not condemning this election meddling, it was defending it, pretty much bragging about it.

Still, the FBI refuses to investigate. The federal courts refuse to investigate.

But then... some conservative rioters invaded the Capitol and trashed the place.

Oh, what's that? Suddenly the FBI is hot on their tail! Suddenly the FBI is investigating with all their resources and trying to find out the identity of all who participated, even going so far as illegally obtaining their private transactions from Bank of America, who are illegally and furtively giving this information to the FBI without a court order. Suddenly the FBI wants to know the identity of every single person who participated in the riot.

And this isn't even the first time that the FBI has been astonishingly partisan, biased and corrupted, as was seen in the first impeachment of Trump (where FBI members were actually sentenced for fabricating false evidence against Trump.)

And you can be god damn certain that the federal courts will work their asses off in the lawsuits against these people.

This speaks to me of corruption and political bias at all levels of the government. All the branches of it. From the very top to the very bottom, at all levels. The FBI is corrupted, the other federal law enforcement agencies are all corrupted, the police forces are corrupted, the federal courts are corrupted, and rather obviously the majority of the legislative branch, ie. Congress, is corrupted.

So, what happens when all of the government, all of its branches, are corrupted and engage in unison in biased partisan illegal activities (such as encouraging political violence, ie. terrorism, and protecting those who do it)? What happens when the "checks and balances" system fails, when all branches of government collude in creating a totalitarian single-party system?