It does happen occasionally. For example Justin Garrison wrote what I would consider a fairly scathing review of Amazon's HR practices related to laying people off, while he was still at Amazon: https://justingarrison.com/blog/2023-12-30-amazons-silent-sa...
He left recently, but he wrote this blog while still being employed there, as mentioned at the bottom of the post.
He left recently, but he wrote this blog while still being employed there, as mentioned at the bottom of the post.