After seven weeks, their impressive performances have been limited to glimpses: Week 1 against the Titans, one of the worst teams in football. The second half against the Bills. The middle two quarters against the Broncos. The final two drives against the Jets. The Patriots team that’s supposed to beat the world occasionally shows up, but it doesn’t stay. And if you’re looking for a cause, it’s nothing new: The Patriots simply can’t stop anyone from throwing the ball on them.