Personally, I haven't even seen Pulp Fiction, or any other of Tarantino's works (that I'm aware of) but I absolutely loved Django Unchained. I was highly disappointed it didn't win its nomination for Best Picture, however I was glad it won for Best Writing, as well as Waltz's supporting actor win - I truly think it/they deserved it.
The fact of the matter with most people, is controversy sells. Especially in Hollywood. Scarface, for example, The Godfather with it's use of "glorifying" the Mafia and even the horse's head. However, both are brilliant pieces of film - it was the controversy that got the masses to pay attention. Tarantino has more of a less "general public" controversy about his work. He's no De Palma or Coppola, or as Tim Burton is not the same as Wes Craven or Alfred Hitchcock.
Django I liked because of the brilliant engagement with the flow of script, story line and incorporated with dark humor. I like it because it wasn't strictly to the "code" of period film-making (I howled with amusement when one of my favorite Tupac tracks played in one of the final scenes - it was golden) it had everything that I look for in an entertaining film. It made my angry at the right times, laugh, cry, and cheer. It's not often a movie can do that. I enjoyed it to the point I went back and watched it the next day. And I'm going back again with my parents, who I'm sure will enjoy it and are as critical about films as I am.
Some people will be disappointed at any film-makers works. Even their biggest and long-time running fans, but it all comes down to personal taste really, and the majority of the voices who are amazed rather than fleeting feelings of "huh" confusion. Of course, that's not to say the majority is right and it's an artwork deserving of being a classic, some of the biggest movies with the biggest following are the biggest pieces of crap in my opinion, but for some reason it worked to achieve the target audience they wanted, and those movies made millions, if not millions of money just from their franchise alone. So no one is wrong, and no one is really right - it depends on the eyes looking at them and how you respond to what's being put forth onto the screen.