Well I guess that it all depends on how you define 'dreadful'. I liked DAD at first, and was not that impressed on other viewings.
DAD was the first and only Bond film I seriously considered walking out on. It was the only one that had me looking at my watch with 45 minutes left to go, and the only one that made me clear all the Bond books off my shelves, rather than buying more. That's "dreadful" to me, but as you say it's all subjective.
However I would be loath to call it the worst film in history.
Well, so would I. It's not even the worst film I've ever paid money to see; just my least favorite Bond film.
My problem is, that people criticize the film for it's excesses but seem content to turn a blind eye or pretend that stuff like this has never occured in other Bond films. Some of the arguments come across as if Bond films are intellectual art films and DAD came along and ruined it. I frankly find the whole thing disengenuous as well as grossly hypocritical.
Well, I can't speak for those people, but here's my take on it. The Brosnan films are, on the whole, pretentious and overly impressed with themselves. All that "peeling back the layers" stuff, with betrayals and heartbreaks, bold examinations of Bond's inner psyche and so on, all in the name of making them "films of substance," when in reality they are anything but. The recurring theme of the Brosnan era comes down to "This time it's personal. Just like last time. And odds are it will be next time, too."
The trouble with "peeling back the layers" is, you can't do Shakespeare in a jetpack. Throughout the Brosnan years, there is this odd and never successful balancing act between emotionally anguished subplots and Road Runner-grade action scenes. Bond's killing of Elektra in TWINE, for example, is a dramatic moment, but it's followed by a ludicrous fight scene wherein Bond juggles a plutonium rod with his bare hands. And in DAD, you have Bond captured, held in prison, abandoned by his service...a great set-up for real drama...and in no time, he's driving an invisible car and riding a tidal wave on an improvised surfboard.
I think the problem is that the Brosnan films...and Brosnan himself...seem to constantly yell, "Take us seriously...look how deeply we delve into Bond's psyche...look how literate and thoughtful we are...we're so much more grown-up than the old films"...only to feature some of the most ridiculous and patently impossible stunts and situations in the entire series. It's one thing if Roger Moore raises his eyebrow and flies a jet out of horse's behind...the whole movie's a romp, so it fits. But don't go on about how intelligent and nuanced your take on Bond is, only to pull out stunts even Wile E. Coyote couldn't manage.
For me, that's the whole issue with DAD, and TWINE and to some extent TND. Unlike the Moore films, which said, "Come on and let's have some fun, reality be damned," the Brosnan films often say, "Let's surf on tidal waves, skydive into falling planes and drive invisible cars...but by gum, you better take us seriously, because this is the thinking man's Bond." Yeah, right.