You aren’t depressed; our brains just aren’t equipped for 21st-century life.
In my experience, the more people have, the less likely they are to be contented. Indeed, there is abundant evidence that depression is a “disease of affluence,”
a disorder of modern life in the industrialized world. People who live in poorer countries have a lower risk of depression than those in industrialized nations. In general, countries with lifestyles that are furthest removed from modern standards have the lowest rates of depression.
Within the U.S., the rate of depression of members of the Old Order Amish—a religious sect that shuns modernity in favor of lifestyles roughly emulating those of rural Americans a century ago—is as low as one 10th that of other Americans.