I get the sensation you're still angry, and that anger keeps you tied down.
As someone who's constantly managing their anger the way a diabetic manages blood sugar... anger can really tie you down and keep you from progressing.
You have to forgive those around you that put you there in the first place. They were doing what they thought was best--and while that might not be much consolation... there will be times in your life where you did what you thought was best, only to realize it was a bad decision. And you have to allow those around you to make bad mistakes--even big ones. Being JW is not right for you... but for those who are JW, it is right for them. And you have to respect that despite the fact they might not respect it back.
I'd watch some videos of mothers and families who have forgiven murderers from killing fellow family members and children. It is possible to forgive if the heart is in the right place for it. Lacking forgiveness is lacking the ability to ever let go. And I think you'll want that eventually.
You have to forgive yourself for participating. You have to know that the factors that brought you to where you are are meant to free you from something that was unhealthy for you. And you cannot be free from it if you're resentful of the fact you participated at all. You have to allow yourself the sense that you're human.. and that what you're going through is a fairly normal process that many people have to go through.
I would definitely join a support group. Support groups have shown great success in forgiveness, understanding, and moving forward vs stagnation.
You need to fill that anger and void with something bigger and better eventually. You might already be doing this, I don't know. If your greater accomplishment is "I'm no longer JW" you really won't be able to seek out WHY that turned out to be good for you. Maybe health care isn't the right department for you to work in (because youll eventually deal with religious impasses like this), or maybe it is (because you can give blood products to children and people who need it, and you can educate people on the importance of things), but either way (depending on your personality), giving back to those around you, making yourself useful in your community.. it will give you a defining factor and sense of who you are.
To give an example, my close friend wasn't recovering from anything really. She spent her time becoming a teacher, and became one. She went on a bad, bad eharmony date with some douchebag. And he made this.. really, really awkward joke that was quasi-serious when she mentioned that he should go further in life if he felt like he was stagnating. And he said something to the effect of, 'Well, what have you really done with your life?' She fired back without hesitation, paraphrasing, 'I fulfilled my childhood dream of becoming a teacher, I work hard at what I do, and I teach and actually inspire children to be educated, enjoy a subject most students hate, and realize that school is the way of the future.' I don't know if she could have said anything about her life prior to starting college.. but since she did, and chose a path to walk down, she's been really confident. She's continued to turn her life around and improve on herself, and she's a great person. And I think how much she inspires and helps others is the biggest factor in all of that. Her job is bigger than herself, and she feels that weight every day.
Instead of trying to take down JW, which you must recognize is an impossible goal.. ideas can't be destroyed like that.. instead, show those JW's what a non-JW can do and accomplish when they aren't held back by religion. How much they can love, and move, and breathe, and do. You have to smother that negativity with positive things. If you try to crush negativity with negativity, you'll find nothing down that road but despair and darkness. Misery loves company. Don't be miserable from this. Don't let this stagnate your life, and keep your heart from flourishing. Many times people stay angry because they're confused on how to move away from that anger. And the answer is consciously letting go. You have to stop caring about it--you cannot love or hate what you don't care about. You still care--you've just swung to the opposite side of the spectrum now. Find balance. And find neutrality.