Final answer:
Bacchus, or Dionysos, is upset at Orpheus' death because Orpheus was an ardent adherent and symbolized deep spiritual connections to the Bacchic cult, especially with his divine musical talents that were revered in Bacchian rites.
Step-by-step explanation:
According to Ovid, Bacchus is upset at Orpheus' death because Orpheus was a devout follower of Bacchus and his tragic end represented a loss for Bacchian devotion and the arts which Orpheus epitomized. Orpheus, with his enchanting music and deep connection to the divine, played a critical role in the narratives and practices surrounding Bacchus. The grief of Bacchus can also be interpreted through the lens of the Orphic-Bacchic Mysteries, which integrated Orphic elements into Bacchic worship, indicating the deep spiritual and mythological ties between Orpheus and Bacchus. Moreover, in the narrative traditions, Orpheus’ ability to move both mortals and gods with his music made him a unique and revered figure within the Bacchic cult. Therefore, his death elicited a profound sense of loss, as it symbolized the extinguishing of his divine artistry and the reverence for Bacchus that he personified through his life and practices.