I do think anti-institutionalism is a better descriptor, I happened to use "anti-establishment" because its the term such folks use to self identify but I agree that framing it around institutions makes more sense. Kind of reminds me of the odd RDS take on oil barons and adjunct professors and how the latter are the true elites. It comes off as nonsensical but if you reframe it as respect for institutions then yeah I guess a University professor is more committed to them than the owner of a car dealership.