Never said that all of it was literal history just that some of it's content had been proved true. A good deal of it is yet future.
How much of Darwin's theory has been proved true?
As for you proving it wrong, it would I fear take a lot more than impulse.
That's what most critics have been using the last few thousand years.
That's not the kind of question science asks, but if yo ask how much has been confirmed by 200 years of evidence, the answer would be all the essentials. If you asked how much of Darwin's original speculation has been demonstrated false, the answer would be, not much.
Perhaps you'd care to take a major section, a complete argument, from Origin of Species and show how it is false.
Perhaps you'd care to show us where DNA evidence is incompatible with common descent.
Give us your best shot.