Scripture teaches time and again that man corrupts things that he touches. The early church fathers recognize this and this is the reason we have the Bible. While the Holy Spirit now endwells Christians to assist us in living our lives (not a small issue), we are still under a curse until we're redeemed through death or Christ's return.
I should add, that I believe every Christian and Christ’s church remains victorious. Our mission is to call out God’s elect.
imho,
Your assertion is certainly far more true, than not.