I can’t speak for others but I was worried about Republicans doing better than their poll numbers again given it’s happened in this area of the country in every election since 2012 and it was an open race in a Trump/Biden state.
Yeah, I think the long, well-documented history of polling misses in the Midwest and the “red wave” narrative being pushed the last two weeks caused me to go against my priors (originally having Dems as favorites in the Senate due to the extreme candidate quality differences)