Yes, it's a really frustrating development that worsens usability. E.g. the Firefox url bar on MacOS became nearly invisible after the recent design change: no borders, 96% bright grey on 98% bright grey.
Don't worry, it's equally shit on Linux.
The part that stuck out to me was the thick border with _corner sections_ on each window. On all 3 operating systems (although less so on Windows) I have struggled to find the 1-3 pixel tiny window that allows me to manually resize a window so many times it's unbelievably frustrating. Having that massive target to grab makes me very wistful. I would happily give up 10ish pixels of screen real-estate on each side of my windows to never have to deal with that struggle again.
Wow, I guess we are polar opposites. I value every pixel of screen space I can have and loathe unnecessarily large UI elements that aren’t hideable.
I was immediately turned off from the GUI myself when I saw this.