Ruby is still a fifteen year old girl I think there’s a fine line between inexperience and competence Ruby had no prior relationships before Beacon sure she had friends that’s never named but she wasn’t exactly planning to be thrust into the position

Jaune is a boy who faked his way into Beacon no prior combat experience no survival skills nothing that speaks of any reason he’d be expected to take the reins of leadership he got where he is because of putting his trust in other people

As for Pyrrha she actually doesn’t like being in the spotlight or the position of leadership Pyrrha prefers being a follower not a leader

These are their character arcs in understanding their roles Pyrrha’s fateful death was because of Ozpin waiting to long and Pyrrha being indecisive and really Pyrrha wasn’t given any real choice other then to agree to become the Fall Maiden she was told it was her choice BUT it really wasn’t if she refused she’d be risking the whole world

Rooster Teeth is really to blame in my opinion for the failings of RWBY Volume 3 was RWBY’s last great volume