As witnessed by the other comment below yours, I have heard people refer to iTunes as a good piece of software in the past. (I am, incidentally, not one of those. I hate iTunes with a passion). The point being, this is a subjective measure.

Does a bad UI make software like iTunes "incomplete"? Again, it depends on your perspective. Missing, or bad data, as is the case in this instance, seems to be a bit less contentious, as can be seen in the quasi-unanimous anger towards the new maps.