I'm sure that underneath the hood, iTunes is a mess - any application as old as iTunes, with the number of features that have been added over time, is highly unlikely to be clean. Having said that, I'm always a bit confused by this kind of thing:
The ugly duckling of the iFamily, this program is hard to understand, hard to use, inelegant, and ill-behaved—in short, the very opposite of most other Apple products. I dread booting it up every day, yet I can’t sidestep it.
Hmm. I rarely restart iTunes - for the most part, it sits on my iMac, not bothering anyone, sharing music out to my home network. When I do have to fire it up, I don't notice it taking any longer to start than (insert any browser here).
As to the UI? Well, I'm sure a UI expert could riff on it, but it seems easy enough to navigate to me. I've never had an issue pondering the differences between the music. podcast, and video displays, for instance.
It's a fairly common meme though, the "iTunes sucks" thing. LIke a said, I'm sure that the developers responsible for it would like to start fresh - based on the age and feature set alone. But from the standpoint of the end user, I just don't see the problem. The biggest issue I have with iTunes isn't really with iTunes itself, it's with the need to do direct connection synching. At the very least, I should be able to synch wirelessly.
apple, iTunes, social media