Fassi, I cannot imagine how bushings could be installed incorrectly in a way that renders the car functional and causes it to pull. The rubber is either where it belongs or it isn't. The preload may be off on the front LCA if the orientation is incorrect - this can be done with or without the proper tools - but that has nothing to do with the car pulling, and can be readily compensated for during ride height adjustment.
Pulling is, in my experience, tire pressure, front or rear camber different side-to-side, dragging brakes, or rear toe.
Your 'wobbly wheel' syndrome is something my car sometimes used to exhibit in parking lots as well. There was nothing wrong with mine - I always wrote it off as an ackermann (or rather lack thereof) issue with sticky tires ... since I installed 993 brake cooling scoops, I can't go to full lock anymore, so it ceased being a problem
Edit: I did have an incorrectly centered steering rack from the PO. Someone put the steering wheel back on a spline off, and compensated with adjusting the tie rods, so I may have had 1 wheel turning more than it should. I have since corrected this. But I don't know if it fixed the issue (see above).