Acedia as a psychological condition was once prevalent among monks, nuns and other people in solitary professions. The creeping spiritual sickness was known as the noonday demon. By the early 20th century, it had spread to the cocktail set.
Acedia can be camp. There’s a manifestation in the film White Mischief (1987) when the jaded socialite Alice de Janzé looks at the sublime beauty of the setting sun and feels nothing: “Oh God, not another f******* beautiful day”.
Orson Welles’ Garbo is so beautiful, so poised, we don’t believe she has real, painful feelings. She comes over as spoilt, vain, and apathetic, not tragically depressed. In her inability to act being herself, she is a grand failure, a camp joke.