Kansas City...weather is as hot as Texas in the summer, and as cold as Iowa in the winter (I know Iowa gets hot, but on average KC was 10 degrees higher and more humid). Not to mention the city can be explored and old in one day, and the people there have become defensive a-holes. Oh, and one other thing, the city is too close to Kansas and filled with K-State and KU fans. If that doesn't seal the deal for worst place, I don't know what will.
Kansas City ... really? Personally I think KC is awesome with the Power & Light District, Westport, The Plaza, Bonner Springs (Kansas Motor Sweedway, NFM, etc...), KC Royals, KC Chiefs, Worlds of Fun/Oceans of Fun, KC Zoo, Boulevard Brewing Company, great restaurants/bars/nightlife, 2 hours from the Lake of the Ozarks and 4 hours from Omaha/Des Moines/St Louis! How you can you beat all of this?