I don't seek to prove the existence of God. That's because I believe in leaving it up to the individual to believe what he or she chooses to believe. You, on the other hand, are hell bent on forcing everyone else to believe in your theory, a theory that cannot be proven. I'm hearing a lot of comments like "degrees of certainty", "no evidence to contradict it" What I'm not hearing is "here's the proof".
Proof is a term for math, so please stop using it, as it carries a connotation of certainty. No theory is ever proven, including the theory of gravity or the theory that the earth orbits around the sun, so the problem is that your expectations are too high, as you are unfamiliar with scientific epistemology and what it offers. It's understandable I guess, being a theist, where absolute truths are around every corner. Here in reality, no absolute truths exist. We can only approximate reality as best we can. It is a humbling proposition, perhaps too much for some theists.
Your logic would dictate that we throw out science altogether. No scientific explanations are certain. We have scientific models or explanations of reality that seem to map to reality so closely, that we term it "true." Yet, there could always be something in the model that is false. However, as long as a model accurately describes and offers predictions that are demonstrable, the model is generally considered to be accurate. We do the best we can. Evolution makes an enormous amount of sense, and fits the evidence if you stop being to mad at it.