I find it very disturbing that there has been so many predictions the WTS has made in the past that failed to come true.
Your reasoning is faulty. If you claim to be one of Jehovah's Witnesses you had better have your faith in God's word. If the Watchtower has taught you anything it is that Jehovah's word is the ONLY source of reliable information regarding history as well as the future. The Watchtower has never claimed to be the source of prophecy. Obviously they are not inspired or unerring. They have only endeavored to understand and explain it in order that your faith might be in Jehovah rather than in men. They have a clear understanding and deep insight into certain things, but unfortunately they are muddled on others. What they are up against is the fact that Bible prophecy is not an open book. And prophecy has been where we have stumbled. But we can be confident that the major framework for understanding prophecy is in place so that it will require only relatively minor adjustments to bring our understanding into proper focus with realities that will soon become obvious. The amazing thing is that prophcies are encrypted in such a way that they cannot be understood by mere human intellect. The truth is, that only Jehovah, through Christ, can unseal prophecies at the time of their chosing, at least as far as such things becoming official teaching. Until God's spirit reveals how certain prophecies are to be understood we are greatly disadvantaged and cannot possible impart a clear and credible explanation. However, not being able to clearly understand prophecies in all their detail doesn't mean that he are not on the right track as far as serving God's purpose. In fact, it is God's stated purpose to conceal vital matters from his people for the time being until the actual time of Christ's arrival during the world's darkest hour. The upside of our being left in the dark on certain vital points, is that when apostate infiltrators are purged from our midst by Christ, that they will go out empty-handed, or empty-headed is the more appropriate term.
Look at the way things went with Christ's apostles. They were Jesus' most intimate followers. If anyone had an inside line on how to understand prophecies it was them. Yet, look at what happened. Jesus told them time and time again that he was destined to be arrested and killed, but they just couldn't get it. Peter even told Christ that he was wrong! Can you imagine being so deluded that you would presume to correct God's Son? But that's the hand they were dealt. Why? Luke, the 9th chapter I believe, says that the matter was 'concealed from them that they might not see through it.' In other words it was not Jehovah's will that it be revealed to them at that time. Latter of course the resurrected Christ explained it to them and more fully open up the Scriptures to them. And interestingly, Christ did not enlighten them until AFTER the original apostate, Judas, had been dismissed from the group. So, you can make of that what you want. But the point is, that for a time the apostles of Christ, and others with them, were running around telling people that Jesus was going to immediately set up his kingdom in Jerusalem. They simply had no clue that it was going to be a heavenly kingdom. They were wrong. And of course they were all scattered and humiliated when things blew up in their face. The fact that the disciples afterwards began preaching a message about a Christ who had been resurrected to the invisible realm where he sat next to Jehovah God was an enormous stumbling block to the majority of the Jews. But, for the apostles who went through the humiliation, they were easily able to make the leap, primarily because they had faith.
But that's the method Jehovah uses to humble and refine his people. We are facing a similar shock, which I am afraid is going to winnow quite a few out of our midst. The Watchtower is just an instrument. The faithful slave is just that---A SLAVE. They are just tiny human instruments that God has used to try to build our faith. However, if your faith is in the faithful slave and Watchtower only, they have failed in your case. Unless your faith is in Jehovah you aren't going to make it. The tests that lie ahead will be so severe, so absolutely unexpected, they will shake our faith to the core so that only those who have the genuine faith of Christ will survive. And isn't that how it should be? / You Know