This writeup refers to Richmond Lattimore's verse translation.

In Achilles' reply to Odysseus, he mentions something that I found very interesting. A little theme of history repeating itself, or rather not learning from history, however recent.

in 9:337-340, Achilles reminds Odysseus of why the war is being fought in the first place, so that Menelaos can bring Helen back to Sparta. Then he compares Menelaos with Agamemnon:

"Are the sons of Atreus alone among mortal men the ones who love their wives?"

Menelaos bring war on Troy because of a woman

Agamemnon brings conflict between himself and Achilles also because of a woman.

In a sense, he is saying "Will these men never learn?" What's worse is that Agamemnon is under no seductive spell from Aphrodite to cause this strife. He's really just greedy. Achilles speaks about what often happens when people in authority are unsure of themselves or insecure about their authority: they heap glory upon themselves endlessly and often at the expense of others, taking their pains for granted and reaping the rewards of their efforts with little or no recognition for those that have assisted them.

I am constantly surprised at how these men and women are becoming so real and believeable in the way they act. We see this type of behaviour in our day and age constantly.

Achilles' behaviour seems to be no different than one might expect in this kind of situation. It's no longer what happened, it's the principle of the thing. It's just the blatant last straw in what seems to have been a long string of backhanded slights to Achilles in their past campaigns (see 9:328-335). No amount of restitution can make up for what's past.