I think we can safely say that desktop open source applications are never going to have the polish of their commercial counterparts. None of the things you asked for are hard but the volunteer labor you are relying on is interested in other things.
The only time open source really works is where it happens to intersect with some commercial interest.
Desktop open source applications is a broad category. I can list a few that are decidedly better than their commercial counterparts: VLC media player, qBittorrent, Firefox*, Calibre
In fact, their commercial counterparts are and were so terrifically terrible, it put teenage me on a journey to discover better alternatives and how I discovered FLOSS in the first place.
What you probably mean is 'Professional' desktop applications are provably never going to match commercial counterparts. In which case, at least for Software Dev work, it hasn't been true for decades.
For creative work, commercial vendors have a tendency to squeeze out more from their customer base after a while, and that provides an opportunity to sneak in. FLOSS can also keep on trucking under the radar and suddenly appear to be good enough one day. Blender is an excellent example.
I think open source developers are also limited by their tools. They often want to make something cross platform so they end up using Qt or Gnome or Electron and these already put you behind. Thinking about it now, I guess it's another example of prioritizing differently, or as you said, interest in other things.
The only time open source really works is where it happens to intersect with some commercial interest.