https://www.cnet.com/news/galaxy-fold-screens-are-breaking-and-this-teardown-might-show-why/

iFixit also noted in a blog post about the screen failures that the Fold's OLED screen, in particular, is "delicate." The device's hinge and the preinstalled screen protector could also play a role in the phone's troubles. The screen protector isn't meant to be removed, and attempts to remove it will kill the screen.

"The phone ships un-folded -- but fold it even once, and that crease becomes pretty easy to spot if you're looking," the teardown noted. The phone withstood 200,000 fold tests from robots, but humans are using the devices in real-world conditions and aren't as gentle as robots, iFixit said.