The hand issues probably depends on where or which nerves are involved.
I'm guessing you have mainly NTOS and not VTOS per your description..

Do you feel that the DC, PT and others were highly skilled?
You can explore our sticky threads like this one - trigger point info- Trigger point information {TrPs} for short

Did any of them focus on top rib mobilisations, forward head/shoulder postures, resolving the muscle spasms or the standard protocol of stretching & strengthening?

I'm assuming you had imaging/MRI to rule out other causes already..

Do you know the cause of your TOS? repetitive, accident, sports, family history of similar?