My Facebook feed is all friends and family who don't discuss politics and ads for nerd shirts. I've purchased a few. It is also easy and effective to hit show me less of this.
I agree about LinkedIn and don't go there unless I'm actively job hunting, something I hope never to do again. I don't feel any bitterness when I see friends and family on FB go on expensive vacations, but I do feel an unhealthy and indefensible jealousy sometimes when I see former coworkers getting new jobs or promotions.