Let me help you out here. There are only 3 things that science has problems explaining that God does explain. The beginning steps of the big bang, the beginning steps of abiogenesis, and the beginning steps of evolution. Science cannot explain any of it, but once you combine God and science in these matters, it all makes a lot more sense.
Now for the other parts of your statement which are completely false. People didn't come up with stories to explain everything. God is not a physical man sitting above us in the clouds watching us. He was able to take a physical form when walking with Adam and Eve in the Garden of Eden. Then in the 1,000 year time span of Adams life, he was able to pass on his experiences with God to his descendants. In fact, there is only a couple hundred years difference between when Adam died and when Noah was born. So there wasn't really any lost information from how everything took place when Noah started creating the first written language to put all the stories into a more tangible form. When it came to God tell Noah to build the Ark, it wasn't just God speaking in Noah's head, but instead talked to him in his dreams. Also it was a few thousand years, not 500 years between the time of the flood and the birth of Jesus. And so what if he made wine for a wedding? What does that prove or disprove?
As far as that quote from Epicurius, there is one simple explanation for that, free will. When we were created in the full image of God, it was not based off of a physical form. This image of God is the heart and soul of who God is, which includes the ability to make our own choices. If God wanted drones to obey His every word without question, He could of done that, but that defeats one of the main purposes on why we were created. We were created for Him to love us and for us to love Him. It isn't true love if we do it because we are programmed to, but instead it is when we choose to. But you know it is funny how you quote someone who was born and died before Jesus Christ. You know in Athens there were many statues depicting many gods; Thor, Zeus, Athena. But there was an alter with a plaque that read "To the Unknown God". Every other statue they were able to name something about that god and what that god supposedly did, but nothing to the Unknown God. I will let you guess who that Unknown God is. If you need help, Paul tells us in Acts 17 about this God.