What stages of life do most people assume are the most unhappy and least rewarding?

Most people often perceive childhood and old age as the stages of life that are the most unhappy and least rewarding. Childhood can be seen as challenging due to limitations and dependency, while old age may be associated with declining health, loss, and isolation. However, these assumptions overlook the unique joys and fulfillment that can be found in both stages, such as the innocence and wonder of childhood and the wisdom and reflection that come with aging. Ultimately, happiness and fulfillment can vary significantly across individuals, regardless of age.