I'm normally pretty forgiving of Apple and willing to give them the benefit of the doubt, but Liquid Glass is really half-baked, and honestly should not have been released in its current state. You could even tell during the beta process that Apple didn't entirely know what it was doing, with each beta having substantial changes to aspects of the design, and even flipping back and forth between changes.
My biggest frustration is an overall lack of contrast in windows and b/w interface elements. In addition, while some of the animations are certainly cool, they're too slow and make the entire interface feel slow (even though it isn't actually slow).
While I am confident Apple will get things figured out, it's worrisome that this happened at all. Even worse, this was an unforced error. I imagine many people are thinking back to the Apple Maps fiasco, but at least when that happened, Apple had a real reason to move away from Google Maps and needed to do something, even if what they did was obviously rushed. In this situation, there was absolutely nothing wrong with the existing interface. I understand Apple's desire to unify the design language b/w the various OS', and I also understand the want to spruce things up a bit, as the previous interface style had been around for quite a while; but again, Liquid Glass was not thought through all the way, and probably should not have been introduced for at least another year. There are enough new (and legitimately good!) features across all of the OS updates that they still would have been worthwhile upgrades even without Liquid Glass (and in many ways the updates would be even more worthwhile WITHOUT Liquid Glass).