Regarding the window manager and Finder; I had a better experience with the Windows equivalents way back on Windows 2k or even Windows 98 more than quarter century ago. Truly baffling.
They also added stupid "quick launch" areas with places nobody went, like "3D Objects", and reduced the menu area to a "grope and find a button" ribbon.
The older Explorers were usable like File Manager on Windows 3.11 was: address bars that were usable from the keyboard and mouse (no subdivision buttons for parts of the path), acceptable launch speed, and no extra "features" that were unnecessary (like it ignoring "use same view for all folders" when your directory happens to have MP3s in it - it'll switch to showing rating / bitrate etc.)
I believe all developers should use older versions of the software to see how usable they were in comparison to the modern "improvement".