99% of games I play work with Proton, or Lutris, which is great most of the time. However, it's the small amount of time when something stops working or needs small config tweaks that really annoy me, as they cut into my gaming time.

Also, setting up games can be a little bit of a faff. For example, wanting to play FFXIV, well, nothing worked at all. I had to go into the config file and skip the cutscene, and also change the launcher to the old launcher. Now, that doesn't seem like much, and it isn't, but the first time I had to do that took me hours to figure out.