Since this is the Science and Technology thread I'll try to focus on that and save the theology for another time.Thanks for the clarification. Since the Flood was a supernatural event there is really nothing to refute. The issues with the story, e.g., no evidence of a global flood or kangaroos only in Australia, are easily explained as supernatural machinations. "Because God did it" is always the final answer.
I wouldn't just write it off like that. The least you can do is learn from it. God is a loving God who sacrificed his only son so that we could live on with our second lives. Prior to it, we could not anymore due to Adam's sin. Just like with Adam, he gives us one command and that is to believe and follow his son Jesus. He is the way and the door to the narrow path. This is in lieu of taking the path of the wide gate. Many people mistake it for heaven's gate. The other big takeaway from the flood is that Jesus is a wrathful God. He will be coming again, probably after your and our deaths. It's prophecized that this will happen and all eyes will see. It means all of our differences will be settled on Earth. Now, the prophecies of what happens is what is allegory and metaphor. We do not know what all the symbolic happening mean including the Lake of Fire (hell) or even Hades, the place of the dead. I think most of will be in a sleeping but conscious state. A few will be suffering right away like Lazarus.
ETA: Science discredits your no evidence for a global flood and kangaroos only in Australia. I've said the Earth was not the same in the past as it is today. Satan and his Antibible of evolution has clouded your mind into accepting uniformitarianism. The Bible does not state that. We had Pangaea the supercontinent and plate tectonics or underseas earthquakes formed our seven continents. The catastrophism changed our geology rapidly. This is how I know that things happen rapidly on Earth. One does not have to wait a lifetime or beyond it.
So far as I know there is evidence for floods just about everywhere but no evidence for a single, global flood. What did science say about why there are only kangaroos in Australia? Yes, we had Pangaea the super-continent and plate tectonics or underseas earthquakes formed our seven continents but those same processes are still going on today and you consider them catastrophic only because your literal reading of the Bible makes you a YEC.
Maybe Satan has clouded your mind into rejecting uniformitarianism?
You're blind. I already pointed out the mountains underneath the oceans and entire buried civilizations around the world. We even have the oxygen-18 now in the rocks. You can't just make the fossils are on top of mountains, and they're marine creatures, disappear. Why should your fossils only show evolutionary layering? That's BS. There was a whole whale skeleton found in the Himalayas. Most of the fossil record is marine creatures. Even the Ark Encounter and Creation Museum has been successful while evolution exhibits such as Lucy have been failures. People do not want your Satanic Temple in the neighborhood.
I had to look up your kangaroos in Australia. It means creation scientist Wallace was right about his observation of the Wallace line. Isn't that enough evidence of God and science backs up the Bible? Of course not. It destroys you and your worldview, so the only way we'll know is after we die. Guaranteed you will know and every eye will see. All the contradictions of God's word and science by Satan's Antibible are not just coincidence. When your science all contradict God's word, it means they are bad and it isn't a coincidence.
Christianity has its own version of the Taliban, just not as heavily armed.