I think you're conflating two things here: negative feedback and biased evaluation. Two very different things.

Regarding negative feedback -- it's not failure, it's feedback. And that's what I mean by the immaturity aspect. When I was a kid, I'd cry when I lost at chess. As I got older I usually learned more from my losses than my wins. They were no longer just failures, it was a chance to improve. Throughout school I felt the same way. Comments on papers/essays and grades I used to make myself better. I appreciated them.

The biased evaluation isn't unique to college. In fact its a pretty major part of life in general. You're going to have to deal with it in businss, dealing with VCs, dealing with spouses, banks, employees, etc... If you can figure out a way to remove it, I'd love to see it.

Regarding out of the box thinking, I generally found it well received. Especially in CS. But I guess YMMV.