I think that was rather the point. Bond in the original book, was not a very nice man. They just made him nicer for the movies, and the later books. DC played him as he appears on the page - with a burgeoning drink problem (bit not the chain smoking of the book, I notice).
The idea, according to the director, was that once you hear the theme, you'll be aware of the previous movies, and be removed from the suspended disbelief that maybe Bond wouldn't be okay