How do you explain where God came from. Please don't say he always was/alpha/omega.those aren't answers?

why aren't those answers, they're just as legitimate as the big bang just happened. For something like that to have happened there mus have been something that was always there forever, which is very difficult to comprehend that there was no beginning to time. This is true whether you believe it was God or not. This is something that we cannot comprehend, even if you believe in the big bang theory, it's hard to comprehend that something just happened, i don't understand why you say that I can't say that he was always there, because that's what I believe and know to be true.