Fascinating thing, I heard a lot about torque steer before driving for a while w/o my shaft, but I didn't find it to be really much of an issue. Don't know how this suggests my car might be broken. :-D Or maybe I'm not just sporty enough in my driving. I thought it was fine. same here, I don't drag...

Find another garage for sure, this one does not have car mechanics understanding how mechanisms (trust bearings, hypoid gears) work.

Literally 4 bolts. Once the driveshaft is out, it is literally 4 bolts.