The pollster, Tavis McGinn, reportedly "decided to leave the company after only six months after coming to believe that Facebook had a negative effect on the world."
https://www.theverge.com/2018/2/6/16976328/facebook-mark-zuckerberg-pollster-tavis-mcginn-honest-data
ref - https://tech.slashdot.org/story/18/02/06/2340221/facebook-hired-a-full-time-pollster-to-monitor-zuckerbergs-approval-ratings
https://www.theverge.com/2018/2/6/16976328/facebook-mark-zuckerberg-pollster-tavis-mcginn-honest-data
ref - https://tech.slashdot.org/story/18/02/06/2340221/facebook-hired-a-full-time-pollster-to-monitor-zuckerbergs-approval-ratings