My First Time Playing the Original Rainbow Six [R6BO Mod] - Mission 1: Operation Steel Wind

Tom Clancy's "Rainbow Six" (1998) is considered one of the most realistic and in-depth tactical shooters ever designed, and I was surprised how well my first mission went. Still, I would like to know why my A.I. was not following waypoints! Either it's because it's an old game, or (more likely) I just don't understand the waypoint system yet.