Every NFL team has played at least half of its games, which means it's time to look back on—and complain about—the first half of the season.

Some fan bases know exactly what there is to complain about. (The winless Tampa Bay Buccaneers and Jacksonville Jaguars come to mind.) Others, such as the 7-1 Denver Broncos, may have a tough time at the water cooler coming up with something negative to say. But careful film analysis of all 32 teams shows that they all have tactical shortcomings, even the teams that seem to be riding...