Hi In-between-days,
Like many others have mentioned, the Watchtower Society's general anti-science stance and complete cluelessness about the real facts concerning the Flood, the Tower of Babel, and Evolution were all a real let down to me. The Society brainwashes you into thinking they are experts on everything so it is a shock to discover what hacks and boobs these "experts" really were once the real evidence is presented.
They are not even experts on the Bible, which they should be at the very least, one would think. For example, as someone else mentioned, when I was a kid many years ago the Society said that Jesus didn't have a beard and illustrated him clean shaven in thier old literature. I seem to remember them speculating that he belonged to some Jewish sect that didn't grow beards, however, I once saw an Amish spokesman who plainly knew more about the Bible than the Watchtower writers because he pointed out to a skeptical reporter that the Amish wore beards because the Bible clearly said that the Romans pulled Jesus' beard and spat in his face. How such an obvious biblical reference could have been missed by the JW "scholars" for years ever since Rutherford's day astounded me. The Watchtower eventually changed their stance on Jesus' beard (though it remained ridiculously short trimmed in modern style) because the evidence was so overwhelming that such an influence of personal taste (Rutherford hated beards) could finally be revised years after Rutherford's death. The JW "unofficial" rule against beards was also influenced by this personal and extra-biblical bias. I, like many others, was "councelled" by the Elders for having facial hair. This was just another in a whole ridiculous set of Watchtower rules which had nothing to do with Christianity or the Bible (like having to wear a tie).
Another big problem for me was knowing how few people in the Middle East and Asia had been reached by the "Good News", and yet knowing that the Society said Armageddon could come at any moment. This was an obvious contradiction to me since Jesus said that his word would be preached to the ENTIRE inhabited Earth before the End could come. Their lame explainations for this gross contradiction of logic failed to instill much confidence in me.
I could go on but these were enough to really make me question the validity of the rest of their self serving grandeous claims. But what do I know? I'm just a grumbler seeking to elevate myself above the brothers because I can't wait on Jehovah.