Leave the anxiety, the anxiety will cause Apple to keep the quality of products high.
At this price point not even 1 should be bent, THAT is the point.
Taking a device back is an inconvenience nobody wants.
It’s really not that expensive. Is a mass produced piece of equipment, not some finely crafted good made by hand. It’s stamped out and glued together on an assembly line. Everything made like this has tolerances. At this scale there will be hundreds of thousands of bad units that make it past QC.
Everything has tolerances. Look hard enough and you’ll notice that all sorts of things are bent or misaligned every so slightly. In this case the tolerances just need to be a little tighter here, which is hard because you’ve got plastic between two sheets of metal. The joint will naturally flex because at the end of the day it’s held together by glue.