Bad Clutch on a 07 Audi A4 with 12700?

I have a 2007 A4 with 12760 miles on. I have been drive a manual for over 10 years and never had to change a clutch. I typically put 40k miles on a car before I get rid of it. The dealership is saying that it is my fault because I most likely rode the clutch.Anyone have any input?

Also, the dealership is saying that the flywheel is blued from excess heat. This seems very unlikely for 12760 miles