While Google and Amazon both have their ethical problems and serious anti-trust issues, Facebook is in a league of its own. The complete, cavalier disregard for the consequences of its own actions as long as they get theirs is utterly unconscionable.
Unlike Google or Amazon, they add nothing of real value to society to balance the abuses they bring with them. All their labors are geared towards extracting the utility of other creators (their acquisitions like Instagram or WhatsApp) or to suck the time and attention out of people through addictive mechanisms. If Facebook disappeared tomorrow a hundred federated online platforms to function as generic address books and life-updaters would crop up over night, and just about every one of them would be better.
You would have to look at lines of business like Big Tobacco to find another field of similar moral perfidy.