My Biggest Disconfirmation of the Existence of God

Theists (specifically Christians) often state that I can't disprove God. Sometimes I wonder if that is because the definition of "God" is a little vague.

If we define God as "a being who makes everything appear purple," then we could disprove God. After all, not everything appears purple. If God existed, everything would appear purple.

So here's a definition of God that I think most Christians and ex-Christians could agree on: A being who is all-knowing, all-powerful, and all-good.

And by that definition, I think I can safely dismiss this God as easily as the God who makes everything appear purple.

After all, if God is all-knowing, he knows what it would take to convince me that he was there. If he is all-powerful, he is able to do it. And if he is all-good, he would want to.

But since I remain sincerely unconvinced that he is there, does that count as a disproof of God, as per my definition?

This is the point where I think some would accuse me of judging God. If God is all-knowing, then I cannot safely say that God would want to reveal himself to me at this time, if at all. An all-knowing God knows things about all-goodness that I cannot comprehend.

To this I can only throw up my hands.

If God does not exist, we will never come to that conclusion if we constantly apply "God works in mysterious ways" to everything. With this rebuttal, at no point will we reach the conclusion that the God hypothesis is garbage. It's assuming an outcome before we've even done the research.