I have drove in 49 out of 50 states (never been to Hawaii) and Illinois ranks the worst in my opinion. It’s like they ran out of asphalt and stopped doing any repairs 10 or 20 years ago.
To people not living in the U.S., feel free to complain about your country’s roads too.
Not sure about the state versus metro thing in Massachusetts but in Illinois it is state wide. If you drive through any of population 10,000 or less towns in Illinois the roads are littered with potholes and are crumbling.