Examples? The data is out there. Not one staff averages 6 innings per start. Less than 30 pitchers are doing so this year ( that's from a few weeks ago, there may be some changes since). There have been numerous links provided to the data.
I also don't get why it is bad to watch a guy throw 5 great innings and leave? You've decided you don't like it, but that's your own feeling, but intrinsically true. Like I said, you can decide you don't like how everyone plays the game, and decide to be unhappy. Or, just watch the game and enjoy it for what it is. That's the beauty of things that are only entertainment, everyone gets to decide how to feel about it and not be wrong.