Your question does not specify which god we are talking about. So I will answer as thoroughly as possible concerning that matter.
Answer and Explanation:
Odysseus or Ulysses is the main character in Homer's epic poem "The Odyssey". He is a hero, who helped Greece win the war against Troy. When his journey home begins, Odysseus angers the god Poseidon. Poseidon is the god of the seas and the father of the Cyclopes. It turns out the Odysseus blinds one of the Cyclops and, out of pride, reveals who he is. The Cyclops then asks Poseidon to delay Odysseus's return to his home as much as possible, so that he arrives "a broken man".
That is just the beginning of this difficult journey for Odysseus. Even though he is proud, he is also very smart. But that does not mean the people surrounding him are also smart. Odysseus's ship crew ends up disobeying his orders and eating the sacred cattle of the god Helios. Angered by this sacrilege, Helios asks Zeus to act. A storm is sent to kill all of them. Only Odysseus survives. He had been warned about this and knew this would be the outcome, but his men chose not to listen.
As we can see, there isn't just one god angry at Odysseus. In any case, the first god to be furious at him was Poseidon. On the other hand, Odysseus could rely on the goddess Athena for help throughout his journey.
