I live in NE Illinois too, and have always had difficulty with most Red Maples. I think they do better further south. And even when they grow well, their typical maple "bush" shape often seems unattractive, with confused branching.
So I say you should tear them out this fall and plant more attractive trees. Are you interested in large specimen trees, short ornamentals, or some kind of screening tree? Let your needs be your guide. I've planted English Oaks that are doing very well...but really take 100 years to develop.
Another tree that grows very well here, and grows quite fast, is the American Elm ... I grow them from seeds in my back yard and transplant around the neighborhood. Altho they ARE susceptible to Dutch Elm Disease, with the arrival of the Emerald Ash Borer, it is getting so that ALL trees have some kind of killer pest. And you can't beat an Americal Elm for beauty in all respects: if they die, just replant. They grow so fast you can almost see the difference from week to week. Prune after first frost to diminish attacks by Dutch Elm beetles.