I'm in 20%. At the day job my boss is great as are two guys higher up (not sure about #4 and above - too hard to reach those). They are not without their issues but they are listening to feedback and keep improving. I usually fill detailed feedback for them each year and follow up in person (for the first two guys in the chain of command) to make sure the message was read right. This year I found very little to criticize them for, which is quite unusual for a crank like me.
In the past I had couple of so-so managers at the same place and our collective feedback saw them managed out of their roles back to what they were good at. But this is the product of workplace where feedback is being listened to, if you don't work in a place like this your options maybe limited.
If you want to change the place where you work and your boss (not leave but make it different), I recommend "The Possibilities of Organization" book
In the past I had couple of so-so managers at the same place and our collective feedback saw them managed out of their roles back to what they were good at. But this is the product of workplace where feedback is being listened to, if you don't work in a place like this your options maybe limited.
If you want to change the place where you work and your boss (not leave but make it different), I recommend "The Possibilities of Organization" book
http://www.amazon.com/Possibilities-Organization-Barry-Oshry...
it will help you inderstand what's going on in the heads of your managers and why they act like they do. I was thoroughly moved by this book.