Even though Rav Nahman emphasizes the importance of not speaking lashon hara [slander], he still peppers the Le.M with his idea that the religious teachers are the enemies of Torah. The subject of "Torah Scholars who are demons" comes up in the LeM vol. I chapter 12 and 28. Rav Israel Odesser the founder of the Na Nach group even makes the same point מפורסמים של שקר ("the famous people that are frauds"). That is the language Rav Nahman uses in LeM volume II chapter 1. And Rav Israel Odesser says אם מפורסם הוא שקר ("If one is famous, then you know he is a fraud").
So to where can one go to learn Torah. It is not automatic that even the name of "Breslov" involves actually following the advice and ideas of Rav Nahman. In fact, usually it does not. So to my mind it seems clear that Litvak yeshivas [based on the path of the Gra] are the only places where one can go to learn authentic Torah. And within that context, it is good to learn Rav Nahman's advice and follow it.