Their app is really bad.
The good news is that their screen sharing based on gnome's private screenshot API should stop working altogether as Gnome 41 is securing those APIs.
Their webapp is quite bad as well though and behind in features especially on Firefox on which, for whatever reason, there's no gallery mode.
They should drop their crap desktop app and focus on building a descent webapp instead.
The weird screenshot thing also leads to confusing issues like this one: https://github.com/flathub/us.zoom.Zoom/issues/223. Zoom tries to avoid sharing its own windows by using an X window property that specifies the owning PID, so it filters out any window where `_NET_WM_PID == Zoom's PID`. In a modern Linux desktop where applications are sandboxed, many different applications can think they have the same PID, so it ends up filtering out other applications.
Not sharing its own windows is nice and all, but I don't think Zoom even does that on other platforms. It's weird how much effort they have put in to doing the wrong thing.
Their webapp is quite bad as well though and behind in features especially on Firefox on which, for whatever reason, there's no gallery mode.
They should drop their crap desktop app and focus on building a descent webapp instead.