you make assertions without backing them up. show us the actual text.
Witnesses believe they are the one true religion. That's a given. They over emphasize the place of their hierarchy. Certainly. But they still attribute salvation to Christ. The issue here isn't their view of themselves as the one true religion, but it is to whom do they attribute salvation. In their theology that's Jesus, and only Jesus. The two issues are not the same.
The governing body sends a mixed message. They claim they are appointed by God, an abuse of the plain meaning of Matthew twenty-four. They believe they are the one true religion. They believe that they lead adherents to Christ's salvation. They also believe there is no salvation apart from Christ's sacrifice. The baptismal questions were cited earlier, and they show that.
Except in definition of terms, we are not far apart. My point is that we should be exact in terms if we wish to have an impact on adherents. I also do not think it is my duty to convert a Witness. We all come to Christ at his father's leading. I think that's the point of John 4. Doubt is more common among Witnesses than they will admit. But there is also a considerable resistance to arguments that do not fit the case. Suggesting that Witnesses believe that salvation comes through the Governing Body is off the mark. Witnesses do not teach that. They do teach that the Governing Body feeds them truth. That's questionable on many levels.