We love to praise linux constantly and tell everyone to change to it (they should) but what are your biggest annoyances ?
Mine would be, installing software (made even more complex by flatpaks being added, among the 5 other ways there already were to install software) and probably wifi power management issues.
I just find it annoying that I have to manually change audio output device every time I connect or disconnect HDMI to our TV. Annoying, but at least not difficult.