Present a BETTER worldview

[theVOID]

- please present a BETTER explanation for the existence of our universe, a cosmological argument, which is more rational than Theism gives us. Why is there something, rather than nothing?

Here's the PREVAILING cosmological explanation of the universe's early development:

Big Bang

Ummm, dude. The Big Bang isn't the beginning of the universe, it's the birth of spacetime from the "Einsteinian singularity" - The big bang has nothing to say about the nature of reality prior to this event since relativistic equations are dependent on the notion of frames of reference in spacetime - Thus no spacetime no equations.

M-theory is frankly the best hypothesis for this phenomenon. Stephen Hawking's new book "The Grand Design" is a really good introduction to the subject, i'd highly recommend it.

- please present a BETTER explanation for the fine-tuning of - The over 120 finely tuned constants of physics to permit life on earth

120? So needless to say you've already done the research required and are simply disappointed God's not one of them?

At any rate a secondary education level science textbook that covers the basics to organic reactions is all you need to understanding the fundamentals involved in biochemistry, if you're referring to Abiogenesis (quite possibly owing to your vague OP) I recommend you give this site a visit:-

http://www.talkorigins.org/

Umm, you really didn't answer the question, you answered a different question

He's talking about constants such as fine-structure or cosmological constants that permit the existence of a type of universe in which matter exists, has the laws that eventually lead to the matter forming stars that build carbon that permit organic chemicals etc. Even the mass of particles needs to be somewhat specific to allow for carbon like structures.

However there is no reason to assume that suitably-self aware structures made out of fundamentally different components cannot exist.

- The initial conditions of the universe. how was it possible the inflation rate of the Big Bang being finely tuned to degree of 1 of 10^120 ?

We can't. That still remains one of the unsolved theoretical problems in physics:

Cosmic inflation

- the galaxy- sun-earth-moon system :

Nebular hypothesis

Yeah, again... i think you misunderstand what fine-tuning is, then again his whole "inflation rate of the big bang was fine tuned" is complete nonsense because the inconsistency of inflation is what made gravity non-uniform and thus allowed the formation of influential masses.

I guess you could call that fine-tuning if by "fine-tuned" you mean irregular In any case there are an extremely large number of possible inflationary discrepancies that would have produced the same effect, so applying fine-tuning here is misguided at the least.