I wonder how many complaints came from people who don't know how to work a hammer or screwdriver.
What might really throw somebody can probably be fixed in short order by most of us.
Not an excuse for shoddy construction but...
Last week I bough a simple shelf at IKEA. I always read reviews. It had 5 stars, of course it did it's a shelf.
It had a 1 star from someone who had trouble scraping off the label.
Now imagine this person working a GPS or fixing anything in a trailer.