I sympathize with you about drs, and the often found lack of knowledge about TOS or any soft tissue or certain repetitive strain injuries.

it's almost like they are thinking - "if it doesn't show up easily on some kind of test - i don't want to investigate or learn about it"

I guess all you can do is keep searching for a good one- I wish I had someone encourage me to see more -as in better- drs for my comp claim- to get a better end result with that part of the mess.

I did find out ,after being in PT for awhile, that the PT places {busy ones} are a good resource for finding Drs that are familiar with specific conditions - and they are usually happy to help with suggestions of drs to see.
They know who refers for what conditions, ect.
So if you have some PT places near you, stop in and chat them up and see what you can find out there.