I can add anecdata for the factory profile being very over-red - it's quite obvious out of the box. Not as bad as many Samsung OLED phones, but it's certainly closer to them than a calibrated screen.

One thing that has bugged me for a while though: why isn't it possible to make my own color profile by hand? Everything seems to imply that you can only get a profile definition file from a calibration device, and I don't have one... but I can eyeball it significantly better than the default profile. Is there something software out there that will let me adjust my curves, like the OS already does with night-mode color balance changes?