No, you are not the only one. Fellow macOS Steam user here. Whenever a game I'm interested in comes out, I first go to the AppStore to see if it's available there, then to the developer's web site, and only as a last resort to Steam. The UX is some of the worst I have to use in a given week. It constantly shows me games that don't run on any system I've ever used (Windows exclusives, but I've never used a Windows machine since I signed up for Steam, for example). It's just awful all around.