I was trying to build up an argument for the existence of God. First I used the cause and effect argument, then the argument of a reason for everything. If I fail to succeed in these arguments then it is pretty futile for me to argue for the existence of a God at all.
The issue isn't your arguments themselves, it's the fact that you've asked exactly the same things before, not paid any attention to peoples' replies (or at least, not acknowledged them), and then months later you've come back to ask the very same thing. It's immensely frustrating, and it's why I feel like I've had the same conversation about half a dozen times since this thread began.
God is a logical candidate to put forward in suggestion.
Not really. In the absence of evidence for his existence, he cannot be a logical candidate. Logical candidates are ones that make sense - such as the theories we currently have.
You can't look at the complication of the universe as a way of implying that God exists. We can already explain many of the complicated processes in the universe scientifically, so it isn't beyond the realms of imagination that even more can be ticked off the list.
I know some deists in this thread already accept the current theories of how the Earth was formed in space. If that, which goes entirely against Genesis can be accepted as simply the work of millions of years of physics, why not the advent of the universe itself?
It can be argued, that the universe could have an ultimate meaning because it began to exist. If it came into existence from nothing without some sort of meaning then what is stopping anything else coming out of nothing too. Why not one day a giant carrot springing into existence? The next day a violin?
Here's a funny thing: In quantum physics, every object in the universe has the possibility of completely disappearing and reappearing somewhere else. So what you're describing - a carrot appearing from nowhere (not entirely out of nothing, as there are only a finite number of particles in the universe, but theoretically one could appear in your hand at any moment), could actually happen.
It doesn't have to have a meaning, although it does have a reason.
It would also involve monumentally long periods of time - billions of times the age of the current universe, in order to ensure the certainty of such an event. Though as ever with the laws of probability, it could equally happen tomorrow rather than several billion billion years in the future. I'd certainly recommend watching
Professor Brian Cox's excellent lecture on the subject if you ever get a spare hour.
If we say that there is a possibility of a beginning from an intelligible effect, with no cause before it, it is likely that there could be an ultimate reason.
Even if God did create the universe, who is to say there was any reason? Maybe it was a chemistry accident. Maybe, he was just bored. Either way, billions of years is a long time to wait for humans to appear, especially if he was looking for something to oversee and control with religion.