Engine , transmission, suspension as well as electrical including HVAC, headlights, tail lights are all imported.
Plastick, urethane parts like door panels, bumpers and other associated items are provided by local vendors which actually mold/ manufactur it locally. The resins used to make these plastic components are of low and cheap quality , in other words low quality raw materials. That's why as you said, same plastic components looks way better over seas.
Then the main thing is how everything is put together. Which matters a lot like Welding is manualy done. I hope in future these things get better.
And this applies to all assemblers , I mean all PKDM