James Lileks says what I've thought on more than one occasion:

...to judge from the credits several hundred people labored on "the Ring 2," from caterers to grips to best boys to gaffers to foley artists to elk wranglers and PR people and bondsman and the usual raft of creative types needed to help a director bring his vision to life. I would love to get them all together in one large auditorium, thank them for trying, then put the question to the room: since all of you are competent rational individuals who obviously know how to make movies, why did that suck? Really, I'm looking for theories here.

Dead silence

Oh, come on. You've all seen good scary movies. Hell, the first "Ring" was good enough, mostly because of that tape. But this sequel sucked so hard David Oreck filed a patent violation. You have to know that. Or does the field of self-delusion never really dissipate? You're telling me there are guys sitting in bars right now banging the table and say "HELL yeah I did costume design for 'Battlefield Earth'"?

Muttering

Okay then. Who wants to blame the writer? Whoa, don't everyone raise your hands.

About how many movies, books, TV shows have YOU thought that?