@Ekfreet yes, but that's not what I'm talking about. Biologically, yes it's fucking incredible that generations of random mutations filtered by natural selection created what we are today. That's an undeniable achievement of evolution and a downright miracle (not the divine kind) that as far as we know (which isn't that far, but still), is still a unique case in all the known universe.
But that's looking at it from a biological standpoint. From a mechanical/programming standpoint?
ATROCIOUS. If the solution you've arrived at is not replicable, it's basically worthless. And life is anything but replicable. Aside from cloning, which is the equivalent of copy-pasting your assignment from Wikipedia, we still have no way to replicate the process of creating life, which speaks volumes about how unnecessarily complicated humans are designed.
Let's not also forget the glaring issues and bugs that have been left unpatched because of that same overly complicated design:
Shivering: when you are cold, your body will try to keep itself warm by shaking slightly. Great idea! Except is so fucking inefficient that it'll make you lose heat even faster! WHAT A DEAL!
Allergies and anaphylactic shock: "What, you mean this peanut
isn't a terribly dangerous pathogen that will destroy this body? NONSENSE! Let's destroy this body to get rid of it!" Thanks immune system, very cool.
Genetical defects: Remember those random mutations that pushed evolution forward a couple thousand years back? Yeah, they're still happening, but they're pretty much useless now, since natural selection doesn't really apply to humans anymore. And if you're born with a bad one you're stuck with it for life, no take-backs. Tough luck bitch! Oh and btw, there's also a chance that you'll pass that defect to your descendants. How's that for a happy thought?
And the list goes on and on... You see what I mean? Of course, all those problems don't hold a candle to the monument that is the miracle of Life, but that's not what I'm appraising here. Yes, the human body can be seen as a fantastically complex machine, but if you evaluate it as if it was an actual machine, as in
something that was built/created by someone, then simply "working" is not enough to have a passing grade.