I find the new UI to be far worse; luckily there are (for now, but it only needs to stick around long enough for a UI replacement add-on to be developed) about:config options you can use to disable the new UI (that is, set the following to false: browser.proton.enabled, browser.proton.modals.enabled, browser.proton.doorhangers.enabled, and browser.proton.contextmenus.enable).
It seems the FF devs are following "cargo cult" development, blindly imitating the Chrome UI without seeming to understand that Google's monopolistic practices that allows them to force Chrome on people rather than because Chrome is fundamentally good or user-friendly. Given Firefox has such small (~3.36%) market share, they should probably focus on avoiding alienating the user base they have.
It seems the FF devs are following "cargo cult" development, blindly imitating the Chrome UI without seeming to understand that Google's monopolistic practices that allows them to force Chrome on people rather than because Chrome is fundamentally good or user-friendly. Given Firefox has such small (~3.36%) market share, they should probably focus on avoiding alienating the user base they have.