Of course I would not be happy and I never said or even implied that you should not be. In fact I don't think anybody in this entire thread implied such a thing. You have every right to not be happy with this defect.
However, your expectation of how this should be remedied is not exactly what most would call reasonable.
A reasonable approach is to let them attempt to fix this. You want to skip this step on a preconceived notion that it will turn out bad. Which very well may be, but since you have no prior experience with this particular dealership, it is just an assumption.
Another point is that you want a brand new vehicle, but yours is n longer brand new. This defect had not prevented you from having a full utilization of your vehicle. So, a reasonable expectation, provided the dealer fails to fix this defect to your satisfaction, would be a replacement vehicle that is in similar condition and miles as yours, not a brand new one.
Again, I do wish you luck and not in a sarcastic way. Just because we disagree, doesn't mean I wish you fail. I actually wish you succeed and if/when you do, I will definitely congratulate you for this.