That’s anecdotal.
So do you think iPhones built in China have terrible build quality? How about the ones made in India? I have an India-built iPhone — can’t tell a difference.
Chinese parts don’t necessarily mean low quality. It may have meant that in the past, but not anymore. People need to get over that mentality.
There’s nothing inherently magical about anywhere (be it Europe, America, India, China, or anywhere else) that guarantees things made there are of impeccable or terrible quality. If it’s built well it’s built well.
The fact is that Volvo's reputation and prioritization of quality builds and stringent safety measures (I owe my life to a rental Volvo S90) are not shared by its Chinese parent company. When that philosophy trickles top-down, Volvo is affected.
In Apple's case, even as a iOS hater (yet a user), I would still say that Apple prioritizes product quality standards at a very high level. That culture trickles down as imposed requirements from Apple to its suppliers.