Even the word depression itself was the terminological product of an effort to soften the connotation of deep trouble. In the last century, the term crisis was normally employed. With time, however, this acquired the connotation of the misfortune it described.
Regardless, heterosexual marriage is largely in trouble today because people see it as a selfish means of pleasing self, rather than a committed relationship in which the focus is on meeting the needs of the partner, that sense of selfishness and the redefinition of love as to something that is purely sentimental and emotional, has been destructive.
Bored people looked for drama and caused trouble.
Trouble is the common denominator of living. It is the great equalizer.
Everybody loves a thing more if it has cost him trouble.