No love for _The Spy Who Loved Me_? Maybe Dalton isn't your favorite Bond, but his entries are at least par for the course rather than a serious plunge.
I'd agree that the last 25 years has given us a lot of duds and _Casino Royale_ is the main exception. However, I think it's more likely that Purvis and Wade are the issue here, as the 1977-1997 era showed that Eon could make a decent original Bond.