Last I checked Facebook had the most active users it ever had. I don't like Facebook either, but it's also sad so many people here live in such a bubble that they think they're part of some big movement of people ditching Facebook.
I don't think anything of the sort. I found that I didn't enjoy my time on the platform so I don't use it anymore. That simple evaluation had more to do with my decision to stop using it than any moral issues I could cite, of which there are many.