I can't think of a single positive experience that is unique to the JW faith
Likewise, they wouldn't be unique to whatever other group also instilled them.
There are good things I could point to from my time as a JW, but I could have gotten those from other religious (or possibly even secular) groups. And perhaps it would not have come with the baggage that I am left with.
Did you get them from those other groups? Unless you did, you have to thank the JW upbringing for them.
You may find that sticks in the throat, but trust me, it's healthier to give fair credit for the benefits than to only look for negatives.