deepsun parent
Naah, Rust from Steam just doesn't even launch on Linux for me (Mint aka Ubuntu aka Debian). Regardless of "Compatibility" choice of Proton. So there's no opportunity to even choose the server.
You need to run RustClient.exe instead of Rust.exe (default) to skip EAC setup. The only way to do this in the Steam UI is to add it as a non-Steam game.