1) Despite an appearance of being "left leaning" (according to polls of faculty political sentiment) they continue to gatekeep education behind prohibitively expensive tuition that is out of reach of lower economic strata without crippling debt, and have simultaneously struggled to produce graduates whose economic differential easily makes up for that expense and lost work time.
2) They enjoy a tax free status while receiving significant tax money despite many failing to grow their student bodies in tandem with the growth of the US population, leading to people questioning whether they deserve those benefits as institutions that serve the public.
3) There is a sentiment that basic literacy and numeracy of graduates has dropped over the last decades outside of a narrow area of studies, because of a shift to a model where students are customers buying a credential instead of getting an education.
(These are all interrelated, of course.)
In reality I don’t think people’s political opinions change very much and they are just mad that their children individuated.
That seems to be missing the elephant in the room - they sent kids in their most formative intellectual years to immerse themselves in a culture where there is a very high child:adult ratio. Then the kids come back with this wild culture that would make a lot of sense to a bunch of teenagers and young adults. It isn't just that the kids individuating, it is dumping them into one of the most elitist, authoritarian and artificial subcultures society maintains - populated mostly by near-juveniles I repeat - giving them independence to form themselves and discovering that dislocates them from their parents subculture.
It should be obvious that will happen but parents tend to be pretty dumb. No real training course for parenting I suppose.