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self-loathing, self-hatred, self-hate.

Origin: Greek ("auto, 'self'" + "miso, 'to hate'")

Since misery is a state of hatred of some, or all, of one's surroundings, automisery becomes the hatred of oneself.

Reference: Galdebrach, The Lord of Time; a time-travel series by Dan Trivates
Esau wallowed in automisery, as he reflected on the many poor decisions he had made, over the course of his life.
by Dan Trivates August 21, 2012