Why did the ghost of ajax refuse to speak to Odysseus?

The ghost of Ajax refused to speak to Odysseus in the Underworld due to his deep resentment over losing the contest for Achilles' armor to Odysseus. Ajax felt humiliated and betrayed, believing that he deserved the honor more than Odysseus. This bitterness led him to shun Odysseus, highlighting the themes of pride and honor in Greek mythology, as Ajax's spirit remained trapped by his unresolved anger even in death.