"G(g)od as you understand him" is not the God of the Bible that AA preaches, and AA did nothing to promote any relationship with the true God.
In reality, there can be no relationship with God if a person is unwilling to turn their life over to God, because this is what Scripture says God demands of a person who belongs to Him. Luke 9:24 is crystal clear on that.
For whoever wishes to save his life will lose it, but whoever loses his [b]life for My sake, he is the one who will save it. For what is a man profited if he gains the whole world, and loses or forfeits himself? Luke 9:25 (NASB)
AA becomes a substitute savior for many who attend, and in fact leads people away from understanding the truth about a salvific relationship with Jesus Christ. To think or believe that following the 12 Steps of any Anonymous group will lead a person to Christ is not accurate. AA clearly states that "god as you understand him" is good enough.