Ask HN: Tech companies known to be awful towards customers or employees?

Read this thread on here about Revolut recently: "Revolut staff claim they’ve been told to quit their jobs or be fired" [https://news.ycombinator.com/item?id=23416169]

The comments in that thread also paint a very negative picture of Revolut.

Upwork is another one that is known to be notoriously bad. Had a terrible experience personally too (Upwork banned my Top Rated freelancer account without any explanation or reason whatsoever despite asking repeatedly).

Which other big tech companies are known to be awful towards their customers or employees or both?