The Patriots defense is missing both of its NFL starting-level DTs. It's missing it's best LB, who happens to be the only LB capable of covering against the pass. It's missing its CB1, which leads to the CB3 and S2 being exposed.
The Patriots offense is missing it's best WR. It's dealing with a TE who's playing his first game of the year. It's missing it's only RB receiving weapon. It's got a pair of rookie WRs who are inconsistent, at best, and who struggle mightily against man coverage. It's got a center who is not starting quality going against an excellent pair of DTs. It's got a LT who's been struggling for much of this young season.
All this, and the team is coming off a last-second win in an emotional game, against an excellent opponent.
With that in mind, why are people posting as if they are shocked that this game has been a struggle?