<Humans aren't the only creatures with faulty design features. I read an article years ago on this topic that used the panda's thumb as an example of poor design to show that evolution was a more likely answer for that particular feature.

Whereas a cat with thumbs is pretty neat. Ever see one pick up a marble?

Complications:
* The giraff is perfectly built for reaching the high, untouched leaves of trees, but all his defenses for survival are lost when he takes a simple drink of water.

* So graceful in the air, but have you ever watched a pelican land on water?

* Our brains are so poorly 'wired' that we need to stalk and kill each other to settle the slightest disagreement, whereas most 'animals' are content to simply dissuade a troublesome herd-member from bothering them (when I think of poorly wired brains, [my serious apologies to Marcel Marceau & "Shields and Yarnell", but, O, what thou hast wrought...] mimes come to mind).

As for so-called 'intelligent design' flaws, our own breeding methods leave a lot to be desired: