Значит стим не запускается, не выдаёт ошибок. Если в терминале запускать, то пишет:
steam
/home/cattle/.local/share/Steam/steam.sh: line 161: VERSION_ID: unbound variable
/home/cattle/.local/share/Steam/steam.sh: line 161: VERSION_ID: unbound variable
Running Steam on arch 64-bit
/home/cattle/.local/share/Steam/steam.sh: line 161: VERSION_ID: unbound variable
STEAM_RUNTIME is enabled automatically
Installing breakpad exception handler for appid(steam)/version(0)