You really don't understand Ohio. And this is nothing different from what Tim Ryan and Sherrod Brown have been saying their entire careers.
Tim Ryan is from Youngstown. It is one of many Rust Belt cities where unions and industry have collapsed since the 1980's.
Trump also did very well in Ohio, and he didn't need to pretned to be a salt &peper working class person to get them to vote for him.
Yes, because his message resonates with that state. The loss of non-college educated whites and young people leaving the state for better job opportunities elsewhere is why Democrats are bleeding support in this state and other parts of the Midwest.
Read JD Vance's issues page. He's using "populist" rhetoric on trade and manufacturing in a state that was built on manufacturing. The collapse of steel brought down the union infrastructure that Democrats needed to compete there. Ohio is trending Republican precisely because the GOP is better at messaging on these issues now. Democrats are forced to focus on three regions of the state just to remain somewhat viable.
Mahoning County flipped from Hillary to Trump. That was a reliably Democratic county and it's unlikely to flip back without generational turnover.