So if you're referring to the biblical god, then it's a proven fact that it/he's a plagiarised replica of hundreds of gods from various cultures who came before him/it.
That's not hard to disprove at all. Heck, even the Catholic church has all but admitted this and many Protestant ministers KNOW this but they go on preaching about this biblical god as if he's/it's the first, one and only god and for what? M-O-N-E-Y, power and prestige!!
As far as disprovinging it's existence, that's been done many times over. Besides, the burden of proof is on the person making the affirmative claim that something exists.
Show me one.