God in his wisdom will allow us to become so frustrated even to the point of walking away from Him. He is that comitted to us experiencing His real grace rather than the fleeting thrill of religion and it's empty promises.
God has allowed thousands to leave the church because they couldn't keep up the goody two shoes performance. The rules religion seemed good in the beginning but it ended in the same type of enslavement that they experienced before coming to Christ. Frustrated they leave and God let's them. Why?
Sometimes you have to cry uncle before you can cry daddy!