Reasons for pulling to left?

[C.A.R.]

He might have said less than 1 degree, it was enough that he said it wouldn't be worth the time. Didn't charge either which is expected but nice, since I can imagine some chain places might have done nothing and charged
Could be brakes, have noticed a slight wobble when braking hard on the motorway. Guy said it could be warped discs or because the little screws that hold the disc on snapped the heads off when I changed them

Was this garage in the Wild West?!