Calling it now: for all the hate Zuckerberg gets now, he's going to be Bill Gates in 25 years, and they only people who won't trust him are the vaccine mind control nuts.
MS "just" used it's behavior to ensure it was the dominate OS, and made some hardware products to boot. They had some questionable telemetry stuff going on, and with the latest OS joined the slimey ad stuff after everyone else had already paved that particular road to hell for them.
FB is much much creepier in all of the information they gather about people without them being aware of it. Not just what/who they follow, but they have insights into their user's financial/spending info, health/medical, and plenty of other stuff that is just too damn much. And they way the implemented it so that they follow you around to gather that info without you even coming close to using their site.
In my opinion, it's just not even the same sport let alone ballpark.