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.
We’re verging on a being a theocratic petro-state, but (therefore?) we do invest in roads. Your average Farm-to-Market is nicer than the US highways in many places. Our crony-capitalist toll roads are mostly very nice to drive on too, smooth even up to 100mph, though you pay for the privilege.