My problem with Symphony and other music apps like Auxio is that they don’t work with audiobooks and file types like m4b. Simple Music Player worked for me when playing all my audio files but now I am waiting for the Fossify version to be published.
Now that Steam is all in on the Steam Deck and SteamOS there is much better support for games on Linux. See ProtonDB.
Also, the Linux distro Pop!_OS has worked quite well for me for games. I use the NVIDIA version which bundles NVIDIA’s propietary library blobs which also helps with the game compatibility.
But all in all I agree with you that even with all of this it is not as smooth as just click and play on Windows. 🙂 Plus some games just don’t work on Linux at all so there’s that. Lol.