> Is there a study or report why all these social dramas are always coming from the FAANG companie?

Because these companies have the highest status and social justice outrage is a form of intra-elite status competition. You'll find that this stuff becomes more intense in academia as you move up the university prestige ladder.

Peter Turchin has written a lot about the general dynamics of intra-elite competition and elite overproduction: see https://www.amazon.com/Secular-Cycles-Peter-Turchin/dp/06911... for example