Actual observations of evolution by natural selection in action show it to be effective as a fine tuning process on something which is already highly complex.
That's what we'd expect to see because that's how evolution works; lots of small "fine tuning" adding up over vast amounts of time. I'm not sure what you mean by "already highly complex". As torridon said, we see a clear progression in complexity in the fossil record and genetics.
However, there is little observed evidence to show it to be providing any substantial increase in complexity.
Of course you're not going to see a giant leap in complexity (increase or decrease; both can happen) over short timescales. Evolution has been at it for about 4 billion years. What we do have is a theory that explains the evolution of complex organisms, overwhelming evidence that that is indeed what happened on Earth, and no evidence at all for any "higher creative intelligence".
Unlike your notion of freedom, we can't logically rule out some sort of intervention, just as we can't rule out
Last Thursdayism, but as torridon and wigginhall pointed out, it would be a bizarre way for some creator to go about things. Why would it put all that effort into making it look exactly as if it had all happened by random mutation and natural selection?