Hey James,
The flood is a moral and logistical nightmare. From the fact a 450 ft wooden box could not be sea faring, to the fact that even if there were only enough species to fill the ark then we would need a rate of evolution of 11 new species (only from the ones known), to get to almost what we know today.
In addition, this water in the mantle as ADCMS's video points out, isn't enough to cover the mountains. If there was no everest, meaning Everest was only HALF of its current height, then we STILL would not have enough water.
Add to that the salt and fresh water fish mixing problem. Add to that the Kangaroo and Koala problem. The Galapagos Island problem. The food on the ark and passangers not dying from methane gas problem. The amount of rain needed to fall in 40 days problem. The fact that mountains take millions of years to form, and that we can see sedimentary layers in them to know if one just "popped" up. The age of polar ice cre samples with air bubbles. The fact there are ant TREES AT ALL. Green things can't live under water for a year.
James this was a story I had a hard time letting go of. In particular because flood legends abound in all cultures. It made me think there must have been something to it. But it would require God to be a conspiracist who did something, but then removed all logical evidence of it having been done. But he hasn't done that with anything else. Dinosaurs for example.
An earthwide flood would be an extinction event, that would require evolution even on a micro level to basically reset millions of years. This happened 4000 years ago?
Come on James.