There may not be a true religion. Even if you think JWs are the closest to being "The Truth" of all religions, that doesn't mean that it's the true religion or that there even is a true religion.
But to get down to the heart of the matter- the Watchtower has never in its entire history come up with a single, original, doctrine or teaching that has later been verified as true by any form of external evidence. Over 150 years, every single JW prediction has failed to occur. Every pseudoscientific claim they have made has proven to be untrue. Every historically revisionist claim they have made has proven to be untrue. 95% of JW doctrines have been tossed aside by the religion itself as being untrue. The current crop of teachings are either unoriginal (ie, borrowed from other religions that supposedly don't have God's holy spirit, or copied and pasted from the very secular bible scholars that JWs otherwise dismiss as being blinded by Satan) or require an a priori, completely unearned, trust that the governing body has been appointed by God to reveal truth.
This is a religion that claims that faith is based on evidence but insists that every time the evidence conflicts with the faith, it is the faith that you must adhere to and not the evidence. This is a religion that, despite historically being wrong about everything, does not accept that there is any legitimate reason not to believe in it, and will use its billion dollar multinational media production operation to publicly slander you as a dangerous, deluded, hateful liar.