The game that has taken more than half of our lifetimes to be released finally has come out to a very mixed reception. Given that in all ratings from the highest to the lowest, most of the positive sentiments expressed are carried by love for the character of Duke Nukem himself, you could argue that it's tantamount to near-universal disapproval:

http://www.metacritic.com/game/pc/duke-nukem-forever

I get the impression that the difference between 30% and 80% is how much nostalgia playing the character of Duke Nukem evoked to the reviewer, less than disagreements about why the game sucks exactly.

It just goes to show you a lesson that developers seem to never learn: the more often a game has to be redesigned from nearly the ground up, the more new development teams it gets passed on to, and the greater the excess of time that goes into developing it, the more and more likely it is to be a total and complete failure. Inevitably, along the way people will lose sight of ultimately why they're developing the game a certain way in the first place and what the game should be. And you get products with existential crises like Duke Nukem Forever.