With that being said i've only had questionable build quality on 2 occasions. The Huawei 6p which was covered under a recall, and the Panda Pixel 2XL where there was some lamination issues.
That being said, the build quality and materials (mostly) really stepped up initially in the Pixel 4, and then noticeably again in the P7. They are quite nice. I don't really find them lacking in quality, fit, or finish these days.