The problem here is that everyone seems to see "time" as something physical that at one point started, is now going, and will sooner or later stop. Time is not like that, time is an abstract idea that humans made up.
If you keep seeing time as a thing, you fail.
To me it's perfectly plausible that all matter in the universe has always been there, and will always be there. Everything doesn't HAVE to have a beginning and end, and everything doesn't HAVE to have been created by this god of yours.
You can say that your life has a beginning and end, but nothing was really created when you were born, that will go away when you die. Every electron and proton that has been, is, or will be in your body existed before you were born, and will still exist after you die and are decomposed to dirt.
I see that people like to point out how stupid it is to believe that humans are a result of random chemical reactions. Guess what, they're not random, it's called evolution.
And a question for Christians: If everything, except God, has an end, what happens after the afterlife?