"So, an increase in fitness is not necessarily an increase in complexity. Is that what you are saying?"
The "complexity" bothers me, but in general, yes. Each thing is tested for fitness. If it fails, it dies. If it passes, that's good. There are a lot of very fit, much less "complex" things out there that are doing quite well.
So the Human DNA chain is more "fit" as you claim. Bullcrap, fit is a term you're using as a synonym to complex. You're right, things that are fit survive, things that aren't don't. But things DO get more complex (DNA chains, multicellular organisms, brain patterns, intelligence quotient etc). The concept of fitness is the biggest crock of s^*t I've ever heard.