You're wrong.
Trump came to power not expecting to and with no real philosophy or experience.
Incompetence has protected us so far, and our system and norms are in place and have a relatively strong history (that is the "Deep State" that he has been attacking)
But he has systematically replaced people with sycophants and simply hollowed out agencies by firing and not replacing those that get fed up and leave.
So far our system has held up reasonably well...but bear in mind...it's only been 3 years. Another five years of this...and we may not recover
You know, it is sort of funny. You start out declaring I am "wrong". Then you move to confirm what I have been saying all along, praising the U.S. institutions' resilience. And you top it off by warning, darkly, that there may not be a recovery five years on. That, of course, is pretty much Biden's selling strategy. None of the points actually contradicts what I am saying, with the possible exception that I am more optimistic than you are about the U.S., and the country's ability to resist the Trumpish onslaught. I would guess, it's possible reasonably to disagree about that, as none of us is able to tell with certainty what the future holds. So, when I state Trump is not Hitler, and unlikely to become Hitler, what separates us are just nuances.
Now, what evidence is there in the current developments pointing to either paths - recovery or not? What I am seeing is folks using the institutions set up to preserve the Republic, and following procedures designed to safeguard it against enemies within, and thus strengthening the Republic and its institutions. Moreover, as news about the rot are being reported and digested by the electorate, support for impeachment and removal is growing, and edging above the 50% threshold just these days. I'd say, by and large these are encouraging signs.
Yes, the damage is immense, as federal agencies are bleeding, losing competent staff, and are being hollowed out, as you say. They can be rebuilt, at considerable cost, and restored, even though that will take time, and all the while the population will be made to suffer from the loss of protection - from meat inspection to climate change regulation. Elections do, in fact, have consequences. That, however, is not permanent. Maybe, just maybe, as the victims of Trump's wrecking-ball style of policy-making are piling up - as they sure will - citizens are going to learn that a well-functioning federal government is nothing to sneeze at. Wouldn't that be glorious?