When I first saw the trailers for The Watch, I was convinced it would suck, but beside that point I thought that it might be trying to hit that Shaun of the Dead note, where a group of under-achieving everymen face a truly threatening and extraordinary situation, and the ensuing comedy is derived from their unfocused and deadpan approach to escaping the danger while still clinging to aspects of their ordinary lives that gave them comfort and security.
(Which for me is a more entertaining and arguably realistic reaction to something like a zombie outbreak than anything I've ever seen Romero cough up, but that's just my opinion.)
The problem is Hollywood has a very dismal, patronizing and outright insulting idea of what the American "everyman" is, characterizing them as over-exaggerated caricature of people pulled out of sensationalized media. You don't feel any kind of relation to these men because they're the kind of people you read about in the papers and decry as some kind of nut-jobs.