A woman is responsible for the start of Odysseus journey because it is the muse that tells him he has to go home. I feel that by having women be portrayed as the monsters are warning men to not trust women so easily. Women cause men grief. This story portrays that. Even Telemakhos had to protect his mom from unwanted suitors. It demonstrates that women either cannot protect themselves or they are monsters causing problems for men.
The sirens are the best example of this. They are so tempting to Odysseus with their song that he cannot resist them. The sirens take everything from men and leave them dead. By having many females be monsters simply warns men to be careful around women. They are portrayed badly because men are more interested in leaning how to preserve themselves than protect