"Next, Descartes invents the idea of the "Evil Genius" which may be percieved as something that is decieving to his senses and himself. In order to disprove the existence of the "Evil Genius", Descartes is faced with the challenge of proving God's existence."

So Descartes theory on God stems from his need to disprove something that he "invents". Also, this argument assumes that the only infinite could be God.

If anything, I believe that this statement "We can grasp the concept of the infinite, but we are incapable of it's excecution." is exactly why we have created God. We can grasp the idea of their being an infinite but we can't explain it or begin to truly find it. To make ourselves better, we create a "God", based on our own image, to help explain this mystery and also to add hope and meaning to the yes and no choices that we make.
Also, this assumes that there is an infinite being. What if there isn't? What if everything is completely evolving and changing? Why is he certain that there is an infinite being?

This theory seems riddled with inventions and assumptions.