Why scrap an A380 with only almost 10 years?
Well, the article you are referring to quite clearly states the reason for the decision to scrap the plane(s): negotiations with airlines to sell or lease were not successfull, so the only option was to scrap, or rather dismantle the plane.

Furthermore, the article presents the estimate by Dr. Peters Group that it would be able to generate some \$45 million  per aircraft by selling the useable components, and an additional  $480 000 / month by leasing the engines.

As a reference, the list price of a new A380 is (was) something like $ 430 million, the actual prices being, however, much lower. When you consider that a 10 year old plane most likely needs a considerable interior refurbishment, the decision made by Dr. Peters Group does not seem so strange, does it?