As an aside: From a 'clickability' perspective the app menus in the top bar are nice of course and I theoretically agree that's the best place for an app menu. But in practice I really dislike macos' 'separated' app menus when a window is not maximized.
This is just a lot of wasted space and makes the menubar harder to click, compared to having the menubar at the very top, next to the screen boundary.
Not long ago there was also a KDE extension to replicate this; however, since many GNOME apps moved away from menubars, this approach isn't that helpful anymore.
How so? It displays useful info at a glance. Where's the bad UX?
And before you make some claim like "use keyboard", the UI includes these window elements for a reason. Top bar makes them less friendly to use: They're tiny and with top bar it's an aiming game instead of a quick way to do something with a mouse or a touchpad.
As an i3/sway user I don't greatly care about this because I already have things the way I like, but I understand the frustration of the OP.
Unfortunately people who design UI or produce specs are not power users so the end products have been losing utility at an incredible pace.
My personal favorite is an input field which clears its content once it loses focus. So when inputting an address on mobile you can't switch back and forth to copy different parts of it.
That info can be shown in the bottom panel, there is enough space there.
Maybe it is better but my experience using it as desktop was absolutely atrocious. I mean it works as designed but it sucks