The problem is, on iOS it's buggy. Floating opaque rectangles blocking you from seeing what you're doing. Software keyboard not being accounted for in the layout so you can't click buttons. It looks different; sure, whatever. It's getting in the way of actually using it that raises ire.
Interesting. I mean, I completely believe you, but I've been using macOS 26/iOS 26 since release, and have not run into any issues like you are describing. I have experienced the keyboard issue, but it was on one specific website, so I am not sure how much of that can be attributed to Liquid Glass or the device OS compared to the website itself.
I have other keyboard issues, but I cannot confidently attribute them to Liquid Glass.