No I haven't.
Before I found Steemit, Facebok was my solace. I was busy making impact with my mind blowing posts on Facebook.
I stopped when I joined Steemit and starting earning money because I thought Facebook didn't have much to offer me.
But lately, I have come to realize that if I must make waves on the social media space, I need to carefully fall back in love with Facebook and that is currently what I'm doing. So NO, I haven't lost faith in Facebook. Facebook is a place to build influence.