I feel exactly the same way. I've been playing with some newer linux distros (elementary isnt bad) in an attempt to find a decent alternative, but even then it's so hard to break the entanglement in the apple ecosystem right now (for me). It's like a no win situation no matter which direction one goes. I think whats ticked me off most is the 2011 15" MBP defects with GPU overheating and eventually dying that Apple has yet to give compensation for, let alone acknowledge.
100% agreement with both posts.
As for iTunes - fix the bloat/bugs and then worry about new features.