Look. It's turtles all the way down. I agree with you. The problem is when we didn't find a literal turtle holding up the earth you're making all sorts of special pleading as to why you still think that's literally the way it is.

The bible does not say "The earth started at this time, and then this many days have passed since then, and we know that because of this and that". You deduce numbers that contradict our observations. Your answer to that contradiction is "God made it that way". Which is a total logical fallacy. 

We're like "woah the earth isn't held up on the back of a turtle, who knew! There's actually other suns, and other planets out there. We're just on one of them!" and you're like "Nope, it's still on a turtle. You're a LIAR and SCUM!"