I think it's just as simple as hereditary elitism failing. All the people producing culture are just the children of people who produced culture rather than there being a selection system that actively finds talent it's just an incestual caste system.

It's the same with the generational gap between jews generally, the TRS guys always talk about how Johnathan Greenblatt contrasts to last generation's jews. He's far less clever and conniving, he's just out in the open bragging about how he's censoring and oppressing people and bringing attention to himself. In the past jews were much more covert despite having the same sadistic constitution and desire to inflict suffering and humiliate people. This decline in self awareness, general intelligence and such is evident in all institutions.