I feel this issue is most likely a reflection of the way your workplace measures and conveys performance. If in the back of your mind you feel your sustenance i

I feel this issue is most likely a reflection of the way your workplace measures and conveys performance. If in the back of your mind you feel your sustenance is at stake due to criticism, you'll never be able to take it lightly. Ultimately looking at your overall performance (rather than individual bumps up and down in a short period of time) is the way to put employees at ease. You can't fix how your employer measures and enforces performance but you can learn to evaluate your own work in stretches of 3-, 6-, 12-months rather than at the granularity of a single PR or a single mistake