That iMessage screenshot looks like MySpace.
I don't use a Mac anymore, but I do use an iPhone. This is the worst version of iOS I can recall. Everything is low contrast and more difficult to see. The colors look washed out. The icons look blurry. In my opinion, Liquid Glass is a total bust. I don't know what these people are thinking. Times have certainly changed.
Embrace Android
Things don't seem much better over there, esp. with Google removing the ability to sideload apps.
As opposed to iPhones were you can .. sideload apps? Your criticism is fair, but not really relevant to the conversation here.
OP was talking about design languages