Several years ago I would have disagreed with you @Hairspray123 but I have to say, I am getting sick of it now too. So much so that I have actually deactivated my facebook. Most people (I had 90 'friends') were OK, but there were about 15 to 18 or so people who did my head in.
The 30-something mommy who kept continually posting pics of herself breastfeeding her baby. She has 3 - had them all within 6 years, and I lost count of the amount of pics of her banging on about breastfeeding and how she is a 'better mother' because she does it.
And she called her husband 'deeply sexual and attractive, and incredibly potent and virile.' Who the fuck does that? 
Then there's a family I know who have a 65 y.o. nan, a 45 y.o. mum, and a 25 y.o grandaughter and 20 y.o. grandson. The 25 y.o. has 3 children from 5 y.o. down to 18 months, and every time I went onto facebook I saw yet ANOTHER photograph of the little kids, and all the 'I wubz my bubz' and 'super mommy strikes again' as she managed to take both children out on her own for a daytrip to the zoo. 🙄
Every single event is documented with dozens of pics, stating how they all have the best life, the best family, and how all the men are such diamonds, and the women in the family are blessed to have them in their lives. The 45 y.o. who has the 25 y.o. daughter and 20 year old son, gushes over her husband, and also goes on and on and ON about how amazing it is to be a 'nana' and posts pics of her 2 grandchildren nearly every single day, with really sickly gushing words along with each post! The 65 y.o. nana does the same.
Then there's a woman I used to work with who has 4 kids - all in their 30s now - and she is always bragging about her holidays to New Zealand, Canada, South Africa, and the multiple cruises she has, and again, going on about her amazing man, and her wonderful grandchildren. and what a gift they are, and how she actually probably loves them more than her own children! (?!) She states how she has the best life, and she understands if people are jealous! 
Then there are a few others who keep posting messages and pics of their kids, grandkids, dog, cat etc, and seem to post happy birthday messages to someone once a week. And I started to feel like I had to 'like' every single post in case they were offended that I didn't acknowledge it.
Then you have the people who post rants, and posts having a go at other people, and getting into fights online. And the people on the local area facebook group who would 'shame' somebody parked partly on the pavement, or who let their dog poo near someone's driveway, and would post a photo of them, or their car. Such attention seeking, nasty behaviour.
It started to become a bit stressful, and it was ridiculous.
I know I probably sound a bit daft/ridiculous/dramatic, but I am done with facebook now. I still have it deactivated and don't intend to reactivate it anytime soon. The people in my life I love and care about - and who love and care about me - are right here in my life to speak to. I don't need to wish them Happy Birthday (or whatever,) on fucking facebook!