I am a Mac user for 10 years and just can't fathom using anything else at this point so I might as well be called a "Mac fanboy". Yet, Monterey's (12.0) UI is a clear regression in comparison to Mojave (10.14). The utter lack of attention to the pixel grid, the unnecessary horizontal paddings where horizontal space is valuable like sidebars, these top bars that are way too huge and combine the title bar with the toolbar so neither fits comfortably, too much spacing between menu bar icons, the "control center" that's clearly made for touchscreens despite macOS devices having none, and this list goes on and on. This redesign was clearly done by someone who 1) prioritizes looks over function and 2) wants change for its own sake.

edit: you know you're making terribly misguided UI decisions when people build software to revert them: https://github.com/MacEnhance/MEMiniMe