OP thinks complaining about the company's terrible behavior and complaining about the lack of M&Ms are more or less the same thing and that if you are bothered about the former you should quietly quit coz hey, not everybody gets sushi twice a week.

I'm not defending privilege. I'm attacking the notion that you should STFU and fuck off when you see injustice because YOU personally happen to be comfortable.

To port it to another context, for instance, Oscar Schindler could have given up his privilege (he was quite privileged!), quit his job and begged on the street for scraps of food and many would have honestly argued that if he was that bothered by what he saw that he should have.

Should he though?