If it looks washed out then you’re definitely not seeing the right image. In fact I’ve gone out of my way to saturate the colors up on purpose this time around. Have you updated to the very latest guest.r shader manually? For my latest update you cannot simply just update slang shaders from within RetroArch, you have to manually install guest.r’s latest shader release as I’ve taken advantage of new features and settings that can only be found in his latest offering.
Also you’re using Android, have you learned how to change the shaders folder directory so that you can assess it?