> Maybe invite someone who has extensive experience working with photoshop and watch how often he starts to curse or ask for help and whether he uses the gun to shoot himself in the head.

The extensive experience working with photoshop is a problem in itself, not a symptom. It sets expectations, and when they are not met, frustration ensues. But the photoshop UI is not the most intuitive one, just most familiar to this kind of person. Those are two very different things.

I understand the frustration, for the same reason I cannot work with Darktable. In some aspects and basic organization it is similar to Lightroom, and when I start using it as Lightroom, it leads to the same frustration. But that's not because the Darktable folks did something wrong, but because I cannot act on my habits from different software package and my expectations are not met. Someone, who doesn't have the same habits and doesn't have to unlearn won't have the same issues.