An interview with the writer of Battlefield Earth... Pretty blunt.
Two writers - one blames the other. Check it out here.
The Razzies named it the worst movie of the decade. But they make choices sometimes based on who will show up to accept. The screenwriters accepted the award.
The worst movie of the decade? I would say "The Room." as for big studio films - "Gigli." But BFE is pretty bad.