Weird. You experienced failures of the manufacturer (failure to start) and the warehouse (huge scratch), and are still singing someone’s praises.
It sounds to me like the brand’s quality assurance is low and the retailer also isn’t taking care of their stock.
If I had to take three days off work to accept these deliveries, doubtless I would have a very different conclusion from yours.
Any dishwasher could have these problems; any warehouse could. How the seller handles the situation is key to whether you use them again.
CostCo has built a huge reputation for being trustworthy as a retailer. If they get purchased by private equity, I will stop renewing my membership, and think about how close the country is to decorating lampposts.
But most people have had a problem with some product they purchased and a company that stands by things and gives no questions asked support is very valuable.