Maybe it’s because they are not elite players. South Carolina is not know to be an elite level state for high school football. I played school ball in South Carolina and coached in Georgia. The competition level in South Carolina is no where near that in the state of Georgia. Just take a look at the top ranked players in South Carolina on 247 and compare them to how many they have compared to Georgia and other surrounding states. Just saying.
It’s called ability to recruit nationally in search of the best players. Sometimes that includes in state players and sometimes it does not. I have a feeling that perhaps you root for a team that does not enjoy nor understand that concept !