Answer:
This description tells us that he was vengeful and resentful.
Step-by-step explanation:
Darius ruled the greatest empire in the world at the time and believed that no one could and no one should oppose him.
But when Athenians started supporting Ionian rebellion he couldn't believe that there is someone who will directly oppose him like that.
That is why he wanted to be remembered about what the Athenians did, so that he could take his vengeance on them.