You know, I have no argument with evolution as such; we see its results every day.

But here is a (simplistic) question I have never seen debated - this may be the perfect spot for it:

When a bicycle, say, rusts away into the ground, the rust does not rise up and become a building; a wheel that has lain there for 100 years has not become a wagon; a human skeleton does not, by itself, become more complex.

To me, it appears that everything becomes LESS complex but more basic. In what way does evolution accomplish the opposite?