I assume you already tried disabling WiFi power saving in the steam deck developer settings, right? Just asking because you mentioned this in neither of your two posts and because I also fixed my 5GHz connectivity issues this way.

EDIT: Nvm, overlooked it in your first post.

It doesn’t run GIMP because it’s an OS for mobile phones…

?

Never understood how you can sleep on your back. Stomach all the way.