Our minds have an inherent tendency toward finding fault. In psychology, this is called negativity bias. As psychologist and regular Wildmind contributor Rick Hanson, PhD, has pointed out, this results from our evolutionary heritage:

Imagine being a hominid in Africa a million years ago, living in a small band. To pass on your genes, you’ve got to find food, have sex, and cooperate with others to help the band’s children (particularly yours) to have children of their own: these are big carrots in the Serengeti. Additionally, you’ve got to hide from predators, steer clear of Alpha males and females looking for trouble, and not let other hunter-gatherer …