the ocean
Poseidon lived on mount Olympus with the other gods but you could also say his home was the water.
Poseidon prevented them from sailing straight back home. Instead it took Odysseus 10 years to get home.
Odysseus.
Because Odysseus blinded Poseidon's son Polyphemus, so then Polyphemus made a prayer to his father (Poseidon) so then Poseidon cursed Odysseus with a hard journey home with many [arils.
Because Polyphemus is Poseidon's son, and Poseidon wants Odysseus to never make it home.
Cyclops asks Poseidon to interfere with Odysseus's journey home out of revenge for blinding him. The Cyclops, Polyphemus, holds a grudge against Odysseus for blinding him and believes that his father, Poseidon, will assist him in seeking vengeance.
Poseidon let's Odysseus live because it is the will of Zeus and the other gods that Odysseus eventually be fated to return home. Poseidon dares not go up against the fates.
Poseidon despised Odysseus. He hated him because Odysseus took Polyphemus (Poseidon's Son) eye. Polyphemus later Prayed to his father and told him to Curse Odysseus. Which Poseidon made a curse that made it harder for Odysseus to get home.
because Poseidon punished him for braging by putting many obstacles to his home
Ajax the Lesser incurs Poseidon's wrath by saying that he will survive in spite of the gods.Odysseus incurs Poseidon's wrath by blinding his son Polyphemus.Other gods, particularly Zeus, incur Poseidon's wrath. Zeus particularly seems to irk his brother as he occasionally attempts to overstep his bounds. Poseidon has to remind him how they chose to divide up the lands.
Because Poseidon cursed him and refuses to let him home. Odysseus had blinded Poseidon's son, Polyphemus the Cyclops, and bragged about it, inciting anger in the god.
Odysseus should not have upset Poseidon because gods were typically appeased to avoid their wrath. By blinding Poseidon's son, the Cyclops Polyphemus, Odysseus provoked Poseidon's anger, leading to his long and perilous journey home in "The Odyssey." Poseidon's vengeance caused numerous challenges and delays for Odysseus, making his journey much more difficult.