Jeff, sorry to hear about your literal run-in with another car.
As far as the bent LCA:
I could see a severe bend backward on the passenger side arm limiting the left turn radius because it would throw the stop block, which is on the forward side of the arm, further forward WRT the lower ball joint, which limits the left turn radius.
If your knuckle is twisted, it would have to between the point at which the steering tie rod connects and the mounting flange for the wheel bearing. It would have to be severe though, to cause any limitation because it would have to bottom out the steering rack prior to hitting the left turn limiter block.
Drifting left sucks. I would have expected it to drift right, towards the damaged side. This can happen after an accident due to a wheel bearing that has been damaged and exhibits more resistance to spin (but I guess it could somehow exhibit less). If everything is rotating freely (or more accurately, with similar resistance) the drifting could be an artifact of the alignment, or the mounting of the tire, or a combination.
Is it possible that they mounted your old tire (assuming it was the same used one) backward? If you had been running with positive camber before (or equally possible, not matching camber, and they mounted the old tire correctly), and the tires wore in that way, if they corrected the camber and mounted your new tire so the taller tread is towards the engine, you would have a dissimilar radius of the center of rolling resistance to the vertical steering axis that goes through the two ball joints. The dissimilar radius would cause dissimilar torque to be applied to the knuckles, and therefore unequal compression forces on the tie rods, which would cause the wheel to drift towards the side with a higher radius of rolling resistance. If that is the case, and the wear is not too severe on the tires, it actually could "work itself out" by wearing the tires down a bit.