Someone is feeling bored and depressed with their life and existence.

Examples:
General Trelane (retired), a.k.a. the Squire of Gothos, held an enterprise landing party against their will to help spice up his life in tos1x18 "The Squire of Gothos".

Aliases:
ennui

References:
https://en.wikipedia.org/wiki/Boredom