Difficulty with AA concept of a Higher Power

I can fully understand your dilemma, and you certainly would not be the first person encountering the idea of a higher power in AA who found it clashed with his own beliefs of how the universe runs or whether there is a God, or any kind of power for that matter.  AA was indeed founded by members of a Christian group, with the idea that if one could put aside one's objections to God or religion, one could achieve sobriety.  That being said, the higher power is to be of "one's own understanding", so not necessarily the Christian God.  The principal this is based on is that it is extremely difficult, and for some impossible, to achieve sobriety on our own - which is why we have come to AA.  We need the help and support of a group of others who have the same agenda, as well as those who have already achieved sobriety.  And if we can, we need to obtain the support of something or someone greater than our selves, greater than our humanity, because it's our humanity that got us drinking in the first place.  

Instead of throwing out the baby with the bathwater, thus missing out on all the other wonderful aspects of AA, perhaps you could conduct an experiment.  Rather than "lying to yourself", put the higher power part of the 12 steps aside, waiting for further enlightenment, and continue with the other steps, and see if this is helpful to you.   According to the AA Preamble, often read at the beginning of meetings, the only requirement for membership is a desire to stop drinking.  If you have that desire, you qualify, regardless of your beliefs.  Talking about the development of the AA principal text "Alcoholics Anonymous", Bill W, one of the founders, said "Our atheists and agnostics widened our gateway, so all who suffer might pass through, regardless of their belief or lack of belief". Knowing this should help you to continue on the program, utilizing the 12 steps to achieve your goal of sobriety.  I wish you all the best on your life's journey toward health and success.