Now when these things had been completed, the princes approached me, saying, “The people of Israel and the priests and the Levites have not separated themselves from the peoples of the lands, according to their abominations, those of the Canaanites, the Hittites, the Perizzites, the Jebusites, the Ammonites, the Moabites, the Egyptians and the Amorites.
Ezra 9:1 Now when these things had been completed, the princes approached me, saying, “The people of Israel and the priests and the Levites have not separated themselves from the peoples of the lands, according to their abominations, those of the Canaanites, the Hittites, the Perizzites, the Jebusites, the Ammonites, the Moabites, the Egyptians and the Amorites.
Ezra 9:2 For they have taken some of their daughters as wives for themselves and for their sons, so that the holy seed has intermingled with the peoples of the lands; indeed, the hands of the princes and the officials have been foremost in this unfaithfulness.”
Ezra 9:3 When I heard about this matter, I tore my garment and my robe, and pulled some of the hair from my head and my beard, and sat down in consternation.
The verse centers on "things", "been", "completed", "princes", "approached", "saying", "people", and "israel". It is saying that the verse draws attention to "things" and "been", so its meaning should be read from those terms before moving to application.
The next verse adds "For they have taken some of their...", so "things" and "been" should be read forward into that movement. In Ezra context, the local focus is covenant, worship, and faithfulness.
A plain takeaway is to answer the verse's own emphasis on "things" and "been" with trust shaped by these words, not by a vague optimism outside the passage.