Is your argument that when a political party hold all major branches of government that it is implicitly corrupt? Or are you arguing that one side is corrupt and the other is not?
Is there a theoretical situation where a single party gaining control is simply the will of the voters? That appears to be a potential valid outcome.
In order: no, of course not; neither side is angelic but only one is corrupt and incompetent at a historic level; and yes, the fatal vulnerability in the system is that a demagogue can win a valid election, allowing them to ignore the safeguards and destroy the system.
The issue is not that a single party has control; itβs that a single person has control, having purged that party of all disloyalty or contradiction, and is now proceeding to remake the entire government according to their rather erratic whims, with very little effective restraint.
The argument is that when a corrupt party against all the levers of power, there is little to stop it from doing whatever it wants. The American government is built on some assumptions about keeping nakedly corrupt, amoral authoritarians away from power.
Is there a theoretical situation where a single party gaining control is simply the will of the voters? That appears to be a potential valid outcome.