Nothing wrong with being a good, demanding customer. Go into a new car dealership, and you will see plenty of examples.
Many decades ago, I ordered a new car in a specific colour. The dealership had to order it in, and advised a date for collection. The date arrived, and the dealer phoned. The car arrived, they registered it, but found it had paint defects, so ordered in a replacement.
As luck would have it, they sold the original car to an acquaintance, didn't point out the paint defects, didn't give him a discount, and initially tried to claim the marks appeared after delivery.
Another new car I ordered multiple decades ago, was an Italian number, with an exotic engine. The dealer advised it was essential to stop and start the engine with the front wheels in the straight ahead position, otherwise very expensive engine issues would result, which were not covered by the warranty. I cancelled the order.
do seem pedantic when it comes to standards, if rumoured delays of aircraft for carpet, internal door and other issues are true, when these should be detected early on by airline staff based with, and working alongside the manufacturer.
The engine issues are in a different league. The downside of cancelling an A320 to make a point, given the pent up demand, is how long it will take to replace it, though I suspect Airbus would shuffle to accommodate.