Personally I don't have any trust in Facebook, nor in Zuckerberg, Sanders, or any of the upper management there.
Facebook does have a really, really useful aspect, providing a link between people that they might not otherwise be able to do without a lot of effort, but it also has a very dangerous aspect to society -- it's also an easy way for some very divisive, extremist people to share and nurture their hate, anger, and intentional misinformation.
It's a matter of weighing Facebook's benefits vs drawbacks, and I tend to think the drawbacks are just too flagrant. In a more just world Facebook would regulate itself and clean up but if there's profit to be made Zuckerberg will put that over any overall benefit to society. He prefers to Facebook to be massively profitable, not just really profitable.