Intelligent Design (ID) crops up from time to time, as a sort of middle ground between Evolution and Creation. Like a red headed stepchild, it is rightly despised by both sides.
A moment's thought can prove that ID simply cannot exist.
Since ladies come first is the only polite way of dealing with things, we will look at them first. They seem to have it good on the surface. Far more visual acuity than men, a much broader range of hearing, more sensory nerves per square centimeter of skin, faster reflexes, and a higher pain tolerance.
Sounds great, doesn't it. Scratch a woman and find a super soldier. Except for certain times of the month, when the charming, witty, sarcastic person sitting next to you is suddenly subject to crying fits and insta-rage. Sure, you get used to it, but it's a poor design if looked at from an efficiency standpoint. At the time a woman is most vulnerable, with a nice blood scent to attract every carnivore in the area, she goes nuts. "Body not pregnant? Defcon 3."
It is far worse though when she does get pregnant. Hot and cold at the same time, willing to eat things that would make a goat puke and culminating in squeezing a large living being out through a rather small opening.
That is an intelligent design?
Of course, women have it easy compared to men. Any God that designs "in his own image" such that the simple action of crossing your legs too fast leads to instant and paralyzing agony is less a merciful God and more one vindictive SOB. Maybe he's a civil engineer. Only they would combine a waste system with a recreational area. And don't get me started on the prostate. Take a vital part of the reproductive system - something we are supposed to use constantly, according to both command and the vagaries of women's hormones - and wrap it around the bowels. No sex? You are also not going to have a decent crap.
In more general terms, your spine has a 50 year lifespan. Your knees, somewhat important for doing basic tasks such as moving, have a similar lifespan, substantially shorter than the threescore and 10 we are told is the norm. An organ we don't even use can explode at random and kill you.
Taking this evidence, we may draw one of three conclusions.
Evolution is imperfect.
ID does not exist.
ID does exist, but the designer is a bit of a dick and really doesn't like us much.