The first time in the LeM of R. Nahman of Breslov that he brings the problem with religious teachers is the the LeM volume I, chapter 8. רברבי עשיו The princes of Esau. This Rav Nahman says refers to religious leaders of the Dark Side.
The basic idea in that chapter is that the spirit of life comes from Torah. So to be attached to Torah is the source of the spirit of life. But from where do evil people get their spirit of life? From the religious leaders of the Dark Side. The princes of Esau. רב דקליפה The Rav of the Dark Side.
Pretty scary. How do you tell who is who? I say listening to the Gra is the way to go about that. That is: the Gra made clear exactly who are the religious leaders of the Dark Side,--- and the fact that he is ignored is the reason the religious world is so messed up.
One way you can see that the Gra was right is the who are the people that are in fact attached to Torah?--the obvious answer is: the Litvak yeshivas.