What the Bills need is a killer instinct.
A team with a killer instinct doesn't lose 9-6 to the Jaguars on a sunny warm day. A team with a killer instinct doesn't give up 6 straight scoring drives to the Titans in the 2nd half. A team with a killer instinct doesn't give up 40 yards on two plays in 10 seconds at the end of a playoff game.
Remove the brakes, take no prisoners, kick ***.