This seems less like an argument and more like a loosely connected list of things that the author doesn’t like, everything from Diversity and Inclusion departme

This seems less like an argument and more like a loosely connected list of things that the author doesn’t like, everything from Diversity and Inclusion departments to Bernie Sanders’ appointment to the Senate budgetary committee—the main commonality is that they’re somehow left or left of center. If you already dislike these things, maybe the idea that they’re all related is convincing. But if not, it just seems like recycled complaints. Maybe there is a deep connection to mediocrity in each of these examples, but he doesn’t really make that case, only that the status quo, which he asserts used to be about excellence, is changing.