Complex sentence: Following CJ's exile from Los Santos and Sweet's imprisonment, Ryder is now openly in league with "The Ballas", and Grove Street ultimately, loses power and influence, and subsequently relinquish all of their territory to their rival gangs.
Split into simpler sentences: Following CJ's exile from Los Santos and Sweet's imprisonment, Ryder is now openly in league with "The Ballas". As a result, the Grove Street Families lose power and influence and subsequently relinquish all of their territory to their rival gangs.