Ezra 9

And I said: "O my God, I am too ashamed and humiliated to lift up my face to You, my God; for our iniquities have risen higher than our heads, and our guilt has grown up to the heavens.—Ezra 9:6

O LORD God of Israel, You are righteous, for we are left as a remnant, as it is this day. Here we are before You, in our guilt, though no one can stand before You because of this!"—Ezra 9:15

So much ingratitude...so much trampling and despising on the mercy of God.  So much evil returned for the goodness shown to them by their God.  Nehemiah and Malachi later encountered the same sin.  Neither God’s wrath in the exile, nor His grace in the return was enough to keep them from defecting again.  Truly, Ezra says it all when he says “here we are before you in our guilt”.  They were without excuse, as are we.  There was nothing and there is nothing else to say.

They reward me evil for good,
To the sorrow of my soul.—Psalm 35:12