I'll wade in with a few more flaws:
The human retina has the nerves IN FRONT, which limit the max sensitivity. A DESIGNER could easily have placed the nerves in the back ...
The size of the human head at birth is dangerously large, to the host mother. Prior to modern medical tech, many human mothers died giving birth to the overlarge heads. Wouldn't an INTELLIGENT designer have considered this? From an evolutionary standpoint, if the baby lives, the mother was "successful" ...
Human hearing is quite sensitive: within it's range, it's as sensitive as any animal out there. Young, human hearing, that is. Why do not our hearing-nerves regenerate? There IS an example of regenerating nerves in humans: those in your skin, will regrow if damaged by cuts, etc (so long as the major structures of the skin are intact). These short, surface nerves will regenerate. So. Why not permit HEARING nerves to regenerate? They are composed of small hairs that will "self destruct" in the presence of too much sound. Moreover, over time, they will degrade, too. If we were DESIGNED, wouldn't it be more useful to keep renewing these nerves, to maintain our hearing health? From evolutionary standpoint, good hearing lasts well into your 20's, more than enough time for reproduction and to be considered "successful".