I didn't say anyone hated it...?
Nolan's BB is a very good, well made movie, just not an outright comicbook movie as many were hoping for apparently--mind you, me saying many is not intended as a blanket statement to mean everyone. A great deal of BB appeal IMO has more to do with the fact that he made (more or less) a "sensible" film, rather than a comicbook movie ala SM or SM:TM. Of course the nods toward the comics help.
I remember when BB came out I was really interested to hear what a couple of long time friends and huge Bat-fans thought about the film. One thing was synonymous: BB was a very good movie, just not what they waited years for. As one friend put it: "After waiting all those years for WB to remake Batman, they gave us a guy in a rubber suit again." Naturally and not unreasonably, many were hoping the latest iteration of Batman would follow the popular comics and TAS.
In a nutshell, I think that's all there really is to it. Fans wanted a comicbook movie. After waiting all those years for a remake and seeing how Raimi was able to successfully bring a comicbook to life and yet still enjoy critical acclaim and financial success, Bat-fans were hoping for the same.
I also find interesting what someone else posted, perhaps you?
Batman is best represented in live-action as realistic. That's an interesting point because the "non-superpowered" nature of Batman almost forces you in the direction of realism. In fact the only way to do a comicbook movie Batman would be lean heavily on stylization to suspend or remove the realistic, which is really no surprise. The problem occurs when the stylization goes overboard an seeps into the campy.
Sigh...
I await the day when a noir-ish Batman movie ala TAS or Killing Game comes to theatres.