1) Many who were on the destructive path have been transformed by their teachings (this includes me who was once vicious, and presumptuous and atheistic)
2) Equal monthly pay to all members of the Bethel community regardless of whether they are BC members or sweepers. This is something that still remains as an unattainable dream for the world. But JWs have successfully done it in all their Offices throughout the world for over a century. This is no insignificant accomplishment as this has the potential to solve virtually all the problems of the world.
3) The way they start their day with discussing a spiritual thoughts (Daily Text) puts the members in a good and positive frame of mind empowering them to deal with the challenges of the day ahead. They way they are being trained to talk to objection-raisers and conversation-stoppers gives them good speech mannerism in all avenues of life.
4) Numerous legal victories in favor of freedom of expression and beliefs have helped even non-JWs also.
5) They effectively invited the attention of the world into the thinking that evolution theory is just a theory believed out of convenience rather than conviction [if it were a principle, all scientists would have unanimously accepted it) and restored many biblical truths which Christendom had obscured (prominent among them is the superiority of Father —at a time when the son was viewed as more prominent than the Father, it was JWs who turned the attention of the world to the normal that The Father is highest of all and son is second in power. Such restorations have the potential to make adherents responsible-minded and good citizens! To accomplish such extra-ordinary things on a global scale, extra-ordinary courage is required.
List can go on and on. At the same time I admit that they also have their weak side which arose unwittingly out of good-intention. Even Apostle Paul taught (in 1 Cor 10:11) that the kingdom would come in the first century. Such false teaching did not make believers evil citizens of their respective countries; on the contrary it made them more spiritual preparing themselves to meet the Lord! The Lord did not come, so what? People did become more spiritual, more humane just as students who prepare for examination too early do not lose anything! Hence discreet ones will take benefit from their good points and ignore the rest. Because judgment is on individuals (not on the organizations, religions, nations ... etc)—Mathew 25:31-46.
However, ignoring all the good points of JWs and lashing them indiscriminately helps no one. Many in this forum lament about disfellowshiping and shunning policy of JWs. Of course I do refrain from shunning which I personally consider as wrong. But people choose to become JWs knowing very well about the above policy! Every organization (and even Governments) will have their own terms and conditions designed to protect their interest, and it is natural that anyone who tries to undermine them has to be disfellowshipped or should attract something similar (as Edward Snowdenrightly expects from the US Government). Such measures are not only right, but also a loving act as this is in the best interest of the majority of the law-abiding members of the organization/Governments. Anyone can have disagreements . When I found certain things confusing, I brought to the attention of the higher-ups who, in turn, told me to wait for Jehovah. I left it at that, and am still in the organization. You may accuse me of trying to be part of a herd which is comforting. If I had asserted, I would have been disfellowshipped and organization would still continue as it was before, thus asserting accomplishes nothing. However, asserting implies trying to prove that individual is more important than the organization, hence such individual should be shown the exit so that he can enjoy life outside the boundary!
In your case, you are not enjoying your lives even after coming out of JWs as you are still worrying about what JWs are doing and attacking them relentlessly (just like a divorced husband, who passionately monitors his former wife and attacks her with no let up). What did those who declared: “we should kill Lazarus also” gain? (John 12:10) You can easily dismiss Lazarus episode as fictional. Yet history has enough examples of attacking the good just because they are good.