Anesti Danelis, 28, quit his job at Starbucks on Dec. 6 while strumming his acoustic guitar for customers, who watched in laughter as he sang about his hate for his boss. He begins his performance as “a song for my manager” and doesn’t mince his words as he sings about refusing “to work for someone who treats their employees like s - - t.” The chorus is full of cussing as he cries out, “F - - k this, I quit!” Toward the end of the song, Danelis spills some venti-sized tea about the incidents that led him to hate his boss so much.