Bush invaded Iraq on completely and maliciously fabricated evidence. Literally - all of it was made up. He sought EU approval to invade, was rejected, and then invaded anyhow, starting a decades long war leaving the region in complete chaos severely undermining US (to say nothing of global) security. Other presidents happily carried on and even magnified his war in some ways.

And as you go back you can see that our more contemporary actions are just echoes of the past anyhow. Vietnam was also started on a complete and malicious lie. [1] That lie then led to the deaths of tens of thousands of Americans, practically bankrupted the country (playing a major role in the events of 1971), left the country more divided than ever, and concluded with us running away from Vietnam with our tail tucked.

We didn't start the fire. It just always feels so different in the present because you don't know how things are going to turn out, so there's always the possibility that this time it might be something extraordinary as opposed to just this perpetual and never-ending self-crippling.

[1] - https://en.wikipedia.org/wiki/Gulf_of_Tonkin_incident

I think that people also see that government in all its ministries is becoming less competent, because of deliberate actions, firings, and flight of competent people. Uninspiring, uninterested, loyalists as leaders of each department doesn't exactly help.

And the competence of departments is crucial for the well functioning of the country, services high and low. (Diplomacy, war, and education to electricity and roads).

In my view it's both that the State Department, for example, is less competent than before, and that the administration is less likely to listen to the experts and Department officers than before.

(I'm not american.)