My guess is that the main culprit might be marketing. We underestimate how advertisement shown to us online can shape our reality.

Last I checked Samsung had the most engagement on Facebook just behind Netflix. This means that they are spending tons of money to put their products in front of their customers via social media marketing. Go out and ask any normies for the top 3 brands for electronics, especially that of home appliances, Samsung will definitely be up there somehow, because most people think that big brand = good. How do they know it's big? Well, you see them everywhere!

So I imagine that, "the reviews were good!" is just the surface. The truth is that they ignored all the writings on the wall. In the reality created by the constant exposure, the manufacturer is a big brand, thus they make good cars. Unless someone runs a counter advertisement to tell them about the critical problem the same amount of time or more than when they're shown the car whooshing through multiple scences sytlishly.