[A]s evidence accumulated that Facebook’s power could also be exploited to disrupt elections, broadcast viral propaganda and inspire deadly campaigns of hate around the globe, Mr. Zuckerberg and Ms. Sandberg stumbled... When Facebook users learned last spring that the company had compromised their privacy in its rush to expand, allowing access to the personal information of tens of millions of people to a political data firm linked to President Trump, Facebook sought to deflect blame and mask the extent of the problem... Facebook employed a Republican opposition-research firm to discredit activist protesters, in part by linking them to the liberal financier George Soros. 

... Facebook declined to make Mr. Zuckerberg and Ms. Sandberg available for comment. In a statement, a spokesman acknowledged that Facebook had been slow to address its challenges but had since made progress fixing the platform. “This has been a tough time at Facebook and our entire management team has been focused on tackling the issues we face,” the statement said. “While these are hard problems we are working hard to ensure that people find our products useful and that we protect our community from bad actors.”