The speaker wakes up in a sour, unpleasant state. "Bitter and full of spit" makes the morning feel physical: a bad taste in the mouth, a mood of irritation. The title, "Vitrioholic," seems to join "vitriol," meaning harsh, biting anger, with "alcoholic." That suggests someone hooked on their own bitterness, or perhaps on something that leaves them feeling this way. That reading is an inference from the word itself, since the poem never names the cause.
Then comes a strange image: "I find my head / in the ground." It could mean the speaker is buried in shame or gloom, hiding from the world, or simply feeling close to death. It's also darkly funny, as if the head were something misplaced and then discovered. The last lines, "I hope it will come / to a good end," are ambiguous in a quiet way. Is the speaker hoping the day improves, or wondering what a good end even means? The mood is gloomy, wry and uncertain, with a small thread of hope.