To put it simply, the Jacksonville Jaguars were bludgeoned by the Miami Dolphins in embarrassing fashion on Thursday Night Football was because Miami took care of business on both lines of scrimmage and executed in all three facets of the game.
The Jaguars... did not.
A major reason why was because of the inability to get off the field on third down defensively, and an inability to convert on third down offensively. The Dolphins were 7-for-13 on third down, compared to the Jaguars going 3-for-10. This led to Miami having 34:22 minutes of possession, compared to just 25:38 for Jacksonville.