I would go on TV/internet... and present my real proof to everyone so we can all know the real deal. I think it would bring a serious amount of peace to the world, if we were all the same religion, and it was provable to be real. That's what a real god showing itself could bring.
That's not what happened on the Road to Emmaus. It was a revelation to Paul only, for Paul only, but it totally changed his life. He was a persecutor of Jesus previously. But he changed after that.
I will just tell you. Everything in your words tells me that if you saw God outright, you would mock, challenge, and be prideful toward Him, just as you are here.
In that case, it would certainly be worse for you. In which case, God in his mercy is sparing you Himself, because it would only "heap burning coal on your head".
In other words, you've heard of a "grace period"? This is yours. How good is God. He spares you the revealing because He knows what you would do with it, and it would just make things worse for you. So here you are, on His planet, breathing His air, eating His food, partaking in common grace. You say you want Him but I think maybe not, and He will spare you even that if it's best for you.
He's giving you every chance. You really want to see Him? You like to go outside? Start maybe by going outside. Notice what good things are there and thank Him. Then try to imagine what it might be like if you DID encounter Him, and not just for something to "prove".
The last thing it's about is how much money you drop in the plate, btw. Or anyway, it's not anywhere near the top.