Thanks all for your answers.
Yeah I did start with the premise that "they had it once but lost it" especially because if they never had it ... well it's more than a couple of years that I lead my life according to the idea they had it... so probably it's still hard to embrace that idea. Thanks @Vidiot for the encouragements.
However because until now I took things as they were told (even though I always said I was very convinced in what I believed and researched it - the research was confined only to WT publications) right now I am not gonna make the same mistake. And it seems like I don't have enough time to research and read all the books and all the articles and everything I find regarding JW/prophecies/changes/etc.
@StarTrekAngel I get your ideas. As blessings they keep saying the number of newcomers, the extension of preaching... But as I started to see, other religions/religious organisations can pretend to have the same blessings and by extension God's approval.
@StrongHaiku Yeah I did see Inception and I liked it... And yeah so many things I took for granted... I am amazed now how did I ever believe them to be true...