Comment by Someone

“Spaghetti code“ doesn’t imply “buggy”, so I think is a decent description. Evolution found a good local optimum, but I think that the optimal design would be quite a bit better than what we have now.

A classical example is https://en.wikipedia.org/wiki/Recurrent_laryngeal_nerve. Nobody in his right mind would design a nerve running from your brain to your larynx that way.