Yes it is. Because He's going to end the world, and He's smart enough to not make a world that wouldn't last until He ended it. So there is no need for the rest of the universe to be inhabitable.
So whether the universe is set up well for life or not is evidence of god?
At any rate if this assertion is true then what was the point of making the rest of the 99.99%? It would seem your view of god lies to create a lot of waste space.
It also shows that the earth is the most important, that here aren't other beings out there that Jesus died for, that the earth is the center (so to speak) of everything.
I think you might be failing to understand just how big the universe is. Even with 99% + of it not habitable by life as we know it there is still plenty of wiggle room for other habitable planets out there. Enough so that it's very possible to be hundreds, even thousands of civilizations comparable to ours our there.
Where did all this matter come from,
Don't exactly know, we do have several hypotheses. Though just because we don't know doesn't mean we should apply the god of the gaps argument.
how did that get there,
Same answer as above.
would t it have decayed over an eternity?
No, the process of "decay" or cooling began after the Big Bang.
Where did all of these atoms come from?
a bunch of that energy from the Big Bang as it cooled becoming mostly hydrogen and helium. Those elements in turn formed proto-stars which gave us the other elements.
Am I to assume that the rocks that made the earth before the Big Bang all happened to have all of these atoms and molecules in them at convenient levels of concentration?
The rocks that made the Earth didn't exist at the Big Bang, so no.As noted above the elements had to first go though a refinement process of sorts.
Your reasoning tells you there is no God, mine tells me that it's pretty obvious that there is.
Your reasoning would appear to be based on a lack of or flawed information.