For me its:
OL - 30%
DL - 30%
Rico - 25%
McD - 7.5%
Turnovers - 7.5%
The OL was bad, they faced a good front but the Bills had all but shut down Gerald McCoy and Mack in consecutive weeks. And while the OL was bad the DL was just as bad. The Jest certainly deserve credit for going after Washington/Thornton, this 2 has the worst gap discipline Ive seen in some time. The Jest saw it and ran it down the Bills collective throats.
To add to the DLs poor run stopping ability, they were just as bad generating pass rush.