It isn't simile, because there is no comparison to anything, and it isn't ironic.
Answer:
It shows that the goddesses are the foul ones, not her. The tone is sarcastic.
OR
It shows that Eris thinks the goddesses are ridiculous. The tone is mocking.
Explanation:
Those were some answers that were correct on a multiple choice quiz on this poem. Hopefully that gives you a better idea of what the lines mean :)
