I don't think suspension geometry and design is what people mean when they say build quality. Stuff like panel gaps and alignment, roofs flying off on highways, inability to handle drive-through car washes, and so on is what the "build quality" complaints refer to.
I know most people don't look at those things when evaluating build quality (but some others do). From personal experience I cannot say I've experienced any of the things you mentioned, but it's true that first US made batches of Model 3 were notorious for panel gap alignment issues, and we know those were produced "in a rush" in order to create a viable product.
I believe those issues are not related to the article in question though. The article mentions defects in cars, that given the segment and usage pattern, are to be expected imho. People need to learn how to maintain properly those cars (particularly suspension bushings, wheels and brakes). If you're not familiar with cars, I would recommend taking your car periodically (once a year) for an inspection by a professional.
