Complex sentence: While inside, he is faced with criminals convicted for far worse crimes than his, so he has no choice but to join a prison gang and give up his beliefs to survive, hoping that his family will not be dragged down with him.
Split into simpler sentences: While inside, he is faced with criminals convicted for far worse crimes than his, so he has no choice but to join a prison gang to survive. He has no choice but to give up his beliefs, and hope that his family will not be dragged down with him.