If I am not mistaken, disproving a claim entails demonstrating why the proofs for that claim fail. Thus I think that in the absence of the assumed proofs for the claim "the universe was created by an intelligent being," one simply cannot begin to "disprove" it. Do you have support(s) for this claim which may be assessed?
The burden of proof IS on me and the single most important piece of evidence is existence itself. I use US (and everything) as the proof, now you have to disprove that we were created by a self-aware entity capable of creating everything.
-Sab