I purchased my 2017 infinity Q60 almost a year ago now. I have been having issues with the steering ever sense. I have taken my car in to Infiniti 5 times and every time they can’t figure out what’s wrong with it. Infiniti has my car for over 3 months trying to figure out what was wrong. While they had my car I was able to drive the 2018 q60 where I was not experiencing the same issues. My guess is Infiniti produced a crap vehicle as the first test model and won’t own up to it and replace all of the 2017 models instead they expect everyone to just get used to the problem. Guys this is not how the car is supposed to drive at all.. I drive touchy cars porches, GTRs, Ferrari’s they don’t do what my junk car does. I’m not giving up and I’m going to reach out to corporate because this could be a huge liability for infinity. You don’t design/build a stock car with run flats and then expect car buyers to change them out for normal tires.. it’s bullshit.
Welcome to the forum! Sorry you're having trouble with your Q60, but I wouldn't classify my 2017 Q60 as junk just because it came with runflats vs regular tires. Some of us have owned and driven the high end sports cars you mentioned and I don't think any of us expect a Q60 which is a mid-tier wannabe luxury GT car (imho) to perform or drive like them. After all, the MSRP started below $40k for MY2017.
Given that your dealer has not been able to figure out the issue, have you tried going to a different dealer? If that's not an option and corporate is unwilling to do anything, you could also consider reporting this to the NHTSA (assuming you are in the U.S.). If they get enough complaints, they will investigate and it might force a change at Infiniti/Nissan if it's found to pose a significant safety risk.
Also, we might be able to help if you gave us more information about your 2017 Q60 instead of telling us the cars we own are crap. For instance, is it RWD or AWD, was it purchased new (or used since you've only had it a year), is it modified, does it have DAS or hydraulic steering or the electronic rack and pinion, the lane keep system, etc?