Though Cam Tucker certainly has a sizeable fanbase, it's impossible to deny that he's not a unanimous favorite among the "Modern Family" faithful. In fact, if one were to peruse Reddit, one would find several threads regarding the character loaded with dislike for him. A now-deleted user made a thread asking folks to name their least favorite character, and Cam popped up numerous times, and in a thread of their own, u/Trick_Remove_4593 cited Cam as their pick for the show's worst character. One Reddit user even tried to get to the bottom of why Cam is so hated in a separate thread.
When looking over these examples of fan discussion and others, the main reason why Cam is disliked by many is his personality. Folks seem to find him self-centered, egotistical, and even immature, which are hardly glowing traits for any character one is supposed to like. If that's truly how they feel about the "Modern Family" staple, they'll be glad to know that a series focused on him, Mitchell, and their daughter Lily (Aubrey Anderson-Emmons) is not going to happen. According to Jesse Tyler Ferguson, the proposed project was written up, but ABC had no interest in pursuing it once "Modern Family" came to a close (via Entertainment Tonight).
Like any television character, Cam has his fans as well as his detractors. Regardless of which camp you're in, it's impossible to deny that without him around, "Modern Family" would be a very different — potentially worse off — program.