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.
This is the most important issue facing Linux adoption by far. I wish Valve or someone would step in and start improving Wine/Proton’s general application support. A couple years ago someone made a fork of Wine that got Affinity running, but those improvements never made it back into the upstream project. Productivity software not being given serious consideration is a common problem with Wine/Proton as projects.