My lord...
I step away for one movie and I come back to this! Amusing as it is, I'd like to add my two cents.
You want an answer to your "big bang question" Iacchus? I'll give you one.
Do you believe in the Big Bang? Isn't this in effect when matter was "created?" So, what existed before the Big Bang?
Yes, I believe the Big Bang, as it is the best theory we have so far. Although I'm not up to date on current big bang theory, I'll go so far as to say "yes, all matter was created during the big bang". (This could be wrong, but it doesn't matter for this discussion).
These first two questions are all very well and good, but then you start getting silly. "What existed before the Big Bang?".
The answer is simple. Nothing. There was no existance before the big bang (excluding, of course, the possibility of a universe which ended in a big crunch, starting another big bang...). Existance is defined as something that is inside our universe. As our universe 'started' at the time of the big bang, anything before the big bang did not exist. This means not only is the answer "nothing", but we can never actually
know if there was anything before big bang. This is not an "I don't know" answer, it's a "we
can't know" answer.
This makes all metaphysical ideas about a 'creator outside the universe', etc, especially moot, as they are all unfalseifiable. We simply can never know why the universe started (i.e. what caused the big bang).
And so, having answered your question, I ask again. What is your 'proof' that existance demands meaningness?