isn't even that good at UX/UI or design
Open source projects don't excel at it either, it took GNOME 20 years to stop looking frozen since the 90s. KDE is a toggle and checkmark mess.
Only the users know how to cater themselves, AOSP derivatives, UNIX/Linux rice, seasoned designers copylefting/giving away typefaces and assets, orgs advocating and implementing accessibility options in video games, etc, etc.
The ability to pick a temp folder to store your downloads is a feature, not a workaround, and every browser has it since forever™.
There's absolutely no way in Elon Musk's xHell or Linus Torvalds kmodHeaven that you choose Edge just because it saves you 2.7s every time you download pepelore compilations in 4k HDR AV1.