With any large manufactured piece of equipment, you can expect a few small things to go wrong, but some of the basic things you are listing are just plain sloppy workmanship and should have never left the plant.
But as long as people buy the junk, the manufacturers will continue to sell the junk.
Even on out HitchHiker Champagne we have had a few minor things...a sink drain leaked in the kitchen and the fancy vessel sink in the bath leaked at the base. Both of these I fixed.
So to the new buyer, get a good PDI list and give the dealer a copy and tell him this is what you will be checking and you will not sign the papers until the unit is demonstrated at 100% and the PDI list is 100%.
Ken