I am still convinced that most people would find any music library application with a similar feature set similarly complex and complicated, that the problem is not iTunes but peoples' expectations.
But it's not a music library application alone. It's also a movie/TV show library app, podcast service, music streaming service, iOS app backup manager and device sync manager.
The problem is most definitely with iTunes, it's great that you enjoy it so much but most people seemingly do not.
As for there being an easy solution; obviously none are easy, but Apple has beyond the manpower and $$$ to work on a new solution. They've already done this with many of their other apps, which yes, have lost features in their initial re-release, but have been added back over regular updates and in many ways the replacements have been much more modern and enjoyable to use.