De*32:4 He is the Rock, his work is perfect: for all his ways are judgment: a God of truth and without iniquity, just and right is he.
Just because people did not instantly see a perfect Bible does not mean that God failed. In reality, God's work is in all of history, so we recognise that God did indeed bring things to a perfection in regards to having a perfect gathering of His words into one book, which was later and way down the line from the time of inspiration.
http://www.bibleprotector.com/trumpet.pdf
The reality is that we have a standard, that we have a perfect Bible, so we can point people to it.