I've never had a problem seeing other people share good things about their lives, it makes me happy for them and it helps me see that not everything in my life is bad. Now, when it comes to people posting questionable/ignorant stuff that I don't like to see, I just delete them. I have less than 40 FB friends, and I honestly think that's a good number. Any more and I wouldn't be able to deal with keeping track of everyone, and I've weeded out the people that post things which can upset me (which isn't a big deal because I didn't care about those people anyway). But I have always been someone who has a small circle of friends, I'm sure it's probably different for other people. If you feel the need to delete your account because it really is that stressful to you, then I say do it.