You'll want to learn more about the distinction between "political appointees" (who, yes, are generally changed out when the administration changes) and "career civil servants."

Trump's administration as President 47 has gone deeply after the latter, which is new. And, arguably, dangerous; we do not know what happens to the function of the modern federal government when we start pushing out skilled professionals in the specifics of administration of specific pieces of the bureaucracy and replacing them with neophytes. We don't know because it isn't done (and may be illegal, see https://www.nteu.org/schedulef - the Pendleton Civil Service Reform Act of 1883 was created to prevent "spoils system" hiring and firing after President Garfield was assassinated by someone who believed he should receive a civil service job for supporting the President).

I think you are correct that a counter-revolution is in progress. Not all revolutions end in something better. Most end in something remarkably worse.