The idea of a ‘crooked bow,’ in Psalms 78:57, describes the people as failing to fulfil the purpose of their choice by God. As such a weapon does not shoot true, and makes the arrow fly wide, however well aimed and strongly drawn, so Israel foiled all Divine attempts, and failed to carry God’s message to the world, or to fulfil His will in themselves.” (Maclaren)
It’s about us missing the mark, trying in vain to become a ‘god’ for ourselves and abandoning the one and only God who knows us and our destiny. We all left and lead by our nature are but just one step away from making a shrine of people and things but never God. That is idolatry.
No matter how good or attractive an idol might be, eventually, it will destroy us.
Until God is in the right place in our lives, we will forever be crooked bows.