Massachusetts

The linebackers are slow and can't cover receivers. Hightower is done.
The defensive backfield really sucks (they kept ROWE and let go of Butler!)
They have NO truly talented wide receiver (they let go of Cooks and Amendola)
They have one new receiver who can't catch the ball (Dorsett)
They have one new rookie running back who can't catch the ball (Michel)
They have a shitty offensive line that can't even block the Lions' D-line.
They can't convert on third downs.
They have a shitty defensive line with no pass rushing threat.
They can't stop the opposing team on third downs.
They have a 41 year-old QB who hates his job and his coach, and understandably so
after SB LII and lack of supporting cast.

Other than that, everything is fine.

Someone has neglected to keep the talent pool full. That would be the cheapskate GM. That would be one Bill B.

Good news is that most teams in the AFC also suck.