As an agnostic who fence sits on the existence of god I cannot see how we got to where we are today without a creator because even if you assume the big bang was the starting point (leaving aside for a minute the infinite regression paradox) all the other occurrences after that still don't make sense.
Scientists now believe that even the first single celled organisms that they can trace back to had hugely complex DNA with a vast amount of information programmed into it. That is the equivalent of saying that the first painting a child ever painted the first time they picked up a brush was copying perfectly the Mona Lisa. My understanding of science is pretty basic but to me it just doesn't compute that the starting point is already so complex in an organic system that wasn't designed by a creator. The counter argument to this is that there were even simpler organisms before "LUCA".
The clearest picture yet of our “last universal common ancestor” suggests it was a relatively complex organism living 4.2 billion years ago, a time long considered too harsh for life to flourish.
www.quantamagazine.org
But my guess is even those "simple" organisms which preceded "LUCA" were surprisingly complex. Unless in the future scientists can provide evidence of some preceding organism which could have actually functioned while being extremely basic (i.e. not containing a vast amount of DNA and thousands of proteins, etc) then the whole story does not make sense.
jmtour.com
creationmoments.com
