I agree, the user experience of Microsoft Teams is beyond bad. Thankfully I don't have to use Microsoft Teams on a regular basis. However, some times when I had to, it wouldn't show any audio or video devices to select and consequently audio and video didn't work.

Turns out that's the behavior Microsoft Teams exhibits under Linux when it can't add inotify watches for whatever reason.

There is no visible error message of any kind in this case, just an empty list of audio and video devices. How on earth do they expect users to debug and fix that?