What can be learned about odsseus from the defeat of himself and his men at ismarus

It shows that greed can bring great unhappiness.

Explanation:

The men had received treasures. If they had been satisfied with only that, they could have returned home to Ithaca as happy and fulfilled men. But, because of their greed, many of the men did not return home at all.

Giving into greed can cause you great misery. The men had received treasures. If they had been satisfied with that, they could have returned home to Ithaca victorious and wealthier. Because of their greed, many did not return home at all.