Observational science doesn't disprove ideas about origins. Those ideas can't be tested scientifically. All that can be done really is to interpret the data in the context of your preferred presuppositional research framework. That's what materialistic scientists do... that's what scientists who believe in a young universe do.
Again, this is wrong. The "Young Universe" so-called theory can easily be tested scientifically, and every bit of data says that it's false. In fact, it is for that reason it should not even be called a theory since theories are supposed to have the benefit of empirical data to back them up.