Bah I call bull on your statement. So me that stats for this good amount and please let them not be from a message board. The weakness of current Superman stories is they try so hard to make him an alien trying to fit in. He was raised on earth for his whole life. He shouldn't be an alien any more then any other guy raised in Kansas. But they persist in making him an outsider who can't get the human race. They make him an outside who can't get the problems other folks are having. You can't have the character be Clark Kent in reality but make his Superman person much more real then his Kent identity.
No other guy raised in Kansas can fly through the sun. If Superman is a character who grows up normal then one day gets powers and becomes superhuman then he is every other comic book hero. Superman is more interesting when he is a an outsider from the beginning. They write Superman wrong not because he fails to understand the problems of the human race, but because he advocates for people to do their best for the fellow man-morals he learned from Jonathan and Martha Kent. As for Clark Kent, there was a real Clark Kent-the Clark that Jonathan and Martha knew inside the home, but once they die (and they both need to die), then the real Clark Kent dies as well. What is left is a fabrication that Superboy created with his parents to present to the world as Clark Kent.
"Superman isn't Superman if Clark is the real person and Superman just "what he can do.""
Your describing the precrisis version and thats all your doing. The key to the "new" Superman is that Superman now needs to be even more of an idea or symbol. He can't be married, he can't show fear, he's got to be godlike. Clark Kent can have girl troubles, money issues, job issues, dental issues, decide if he wants onions on his hot dog. Superman has got to be this godlike alien that has people worshiping him and it just makes it impossible for this god to be a mere man named Clark Kent.
Superman ALWAYS had personal issues. Clark Kent is actually part of how he deals with his issues. As Superman, everything in the world is expected and often demanded of him. By being Clark Kent, he can get away with those heightened expectations. He can only walk among humans by being one of them.
But please show me this data that supports the idea that Superman has been a consistent failure since 1986. I'm sure many would disagree as they name quite a bit of their favorite arcs from 86 to 2011.
If you look at total sales and more importantly, sales rank, Superman is currently an irrelevant commodity and has been for years:
60's sales rankings:
http://www.comichron.com/yearlycomicssales/1960s/1965.html
Superman family titles dominating the top ten. Superman, Action, Superboy, Jimmy Olsen, Lois Lane, and Adventure Comics all in the top ten. 1-6 all Superman family, #8 is World's Finest.
1995 sales rankings:
http://www.comichron.com/monthlycomicssales/1995/1995-01Diamond.html
Rankings are 23-25,
2000 sales rankings:
rankings are 36, 40, 50, 51
http://www.comichron.com/yearlycomicssales/1960s/1965.html
2005 sales rankings:
rankings are 21, 32, 33
http://www.comichron.com/monthlycomicssales/2005/2005-10.html
2011 sales rankings:
rankings are 39, 48, 71, 92.
The people who name the more recent storylines as their favorites do so for two reasons: 1) Most modern fans have little respect for or interest in the history of comics and refuse to read anything that is Pre-Crisis with an open mind and 2) The people who were fans of Superman when he was successful and relevant no longer read comics for the most part, and many of them haven't since 1986.
Overall sales charts from 1950-1987 then sample charts from 87-present:
http://enterthestory.com/comic_sales.html