Yet all this availeth me nothing, so long as I see Mordecai the Jew sitting at the king's gate.

Wesley's Notes

5:13 Availeth - Gives me no content. Such torment did his envy and malice bring upon him. Sitting - Enjoying that honour and privilege without disturbance, and denying me the worship due to me by the king's command. Thus tho' proud men have much to their mind, if they have not all to their mind, it is nothing. The thousandth part of what Haman had, would give a modest, humble man, as much happiness as he expects to receive from anything under the sun. And Haman as passionately complains, as if he was in the lowest depth of poverty!

Matthew Henry's Concise Commentary

5:9-14 This account of Haman is a comment upon Pr 21:24. Self-admirers and self-flatterers are really self-deceivers. Haman, the higher he is lifted up, the more impatient he is of contempt, and the more enraged at it. The affront from Mordecai spoiled all. A slight affront, which a humble man would scarcely notice, will torment a proud man, even to madness, and will mar all his comforts. Those disposed to be uneasy, will never want something to be uneasy at. Such are proud men; though they have much to their mind, if they have not all to their mind, it is as nothing to them. Many call the proud happy, who display pomp and make a show; but this is a mistaken thought. Many poor cottagers feel far less uneasiness than the rich, with all their fancied advantages around them. The man who knows not Christ, is poor though he be rich, because he is utterly destitute of that which alone is true riches.