If anyone cares, here is an update.
So, the steering issues got a little worse, i made another apt with a third mechanic. I drove with him city traffic and maybe short bit at 50mph. Very nice guy, but he like the other mechanic unable to really feel anything wrong.
Since the steering issues started after the rotation, i asked if we could rotate tires back to original position. I also figured this would be a good test to see if there is any change in vibration, and he agreed.
I asked him if he thought the steering wheel was slightly crooked (like the second mechanic did) and he agreed. However, like the second mechanic, he assumed it was probalby still out of alignment and the dealer didnt do a good job. I personally cant really see this steering wheel crookedness but i trust both of them as mechanics that its not on center.
Guess what. When guy was rotating my tires he remarks “The left wheel lug nuts are loose”. Hoooly crap. This is literally what i thought happened, and he confirmed it.
So, after rotating BACK to original station, the vibration remains exactly the same, i feel it only in the floor and thewheel only at very high speeds sliiiightly so i assume the tires are completely fine. The worst vibration appears to be permanently fixed after the rebalancing at shop #2. I assume the car is just a bumpy ride that i feel vibration in the floorboard, but i previously had a sport corolla and it didnt seem to shake the floorboard that much.
Regarding the handling steering issues, fixing the loose wheel definitely helped but i am still noticing some weirdness. Car sways easily on trivial road imperfections at highway speed, like on grooved surfaces. In general the steering wheel isnt smooth especially at highway speeds… however its no longer SCARY like, where i feel like the wheels are fighting or have a mind of hteir own making angled turns at high speeds (e.g. taking an exit or changing lanes on highway).
I do think something is still wrong, maybe a bolt is loose in the suspension somewhere. But the wheels cant be dented, he spun them and looked, and rotating didnt change the vibration at all. If the wheels arent dented its unlikely the curb bump damaged anything in my suspension however its possible something is loose and needs to be tightened.
The #3 mechanic, nice guy, but he admit what i am describing is minor enough he probably wouldnt be able to see or diagnose it in the suspension.
Too bad i have no tools and know nothing about cars i would tighten everything myself lol.
At this point i’m glad the car isnt scary to drive, and the steering wheel vibration is mostly gone.
However, i literally feel like my 2010 handled more smooth than this car. Its a shame.