There is, in pretty much all instructors and examiners in any subject I think.
I try very hard to always include positive comments in student feedback, whether I'm teaching flying or marking university assignments. But it takes a really positive effort of will.
Here's a favourite I came across a few years ago:-
This was the school report in science, aged 15, for (later) Sir John Gurdon - eventually joint winner with Shinya Yamanaka of the 2012 Nobel Prize for Physiology or Medicine for showing how to turn mature cells into stem cells. As a result of this poor report he was made to drop school science at 15.
I could show you no end of criticism from my degree and test pilot school courses, in fields I later won international awards in.
There is another way of looking at it - if people STOP criticising you, they think you've lost the capacity to improve. THAT is the point to get really worried.
We should accentuate the positive as well, if only to keep people's morale up. But the attitude that criticism is only presented because people believe that we can use and learn from it is the only one that works.
G