I’m guessing it’s the mention of the AUR.
That LD_PRELOAD cannot be preloaded
message doesn’t seem to be the cause: Cannot run steam: LD_PRELOAD cannot be preloaded - #3 by Zesko
Do you have the steam-native-runtime installed (if you do, uninstall it)?
You may want to check further up (with the up keyboard key, not the mouse scrollwheel) as these aren’t a problem.