That's not exactly what the Disciples said he said, but that's not the issue. If you are saying the sacking of Israel by the Romans was the end of the age, then you are very mistaken. If you're saying only that the destruction of the second Temple as foretold by the Messiah happened as he said it would. You're exactly right. No stone was left unturned, some say because soldiers pursued melted gold flowing down between the Temple's stone building blocks.
“If you are saying the sacking of Israel by the Romans was the end of the age...”
That’s precisely what it was. The end of the Mosaic Age and the ushering in of the Messianic Age. The book of Hebrews will spell it out for you.