The Catholic Church is founded upon Majesterium which is the doctrine that Jesus began a long succession of priests who administered his kingdom work and education through Peter and his subsequent Popes. Moreover, Jesus gave this Catholic Church the right to make policy which heaven would back up with divine authority.
The Protestant Reformation nullified this idea by presenting a rival doctrine of SOLA SCRIPTURA which is the doctrine that no priesthood is necessary for an individual human being. Sola Scriptura says one man and one bible is what God will work through directly as long as Jesus is invoked as the mediator.
The Governing Body of Jehovah's Witnesses coalesce around the doctrine that the MAJESTERIUM applies to them as "anointed" and no Lone Ranger christian can go around them.
When Pastor Russell produced his STUDIES IN THE SCRIPTURES it was promoted as superior to reading the bible itself. This destroyed the Protestant doctrine of Sola Scriptura. In place of one man/one bible through Jesus a hierarchy of "faithful and discreet slave" was interposed in much the way the Pope and his priests served in the Catholic Church. Jehovah would ONLY work through an ORGANIZATION and not through identities of solo believers.
The Jehovah's Witnesses are guilty of Doctrine Shopping by, in effect, stealing the Catholic doctrine and applying it to themselves and replacing the Pope with "anointed".
The Protestant Reformation is set back 500 years!
The corruption of the Catholic heirarchy and the Pope is well demonstrated by history. The corruption of Jehovah's Witness theology through End Times predictions which have repeatedly failed (100% failure) demonstrate no connection with a Supreme Being who administers Truth.
Yet, Jehovah's Witnesses insist on calling their religion THE Truth.