@updownroundandround
Feeling you're being got at by people who were luckier than you in one very specific area of life which you struggled with when they hit you over the head again and again with research that backs up their argument doesn't make you narcicisstic.
Why on earth would you use the words '' they hit you over the head again and again'' and expect to be viewed as anything other than paranoid ? 
I think it speaks volumes about you, rather than being a 'reflection' on anyone else........
I feel for anyone who has ever felt 'got at' by others, but that doesn't change the fact that someone will be offended about something others believe or think or say.
The key is to not keep returning to the company of others who make you feel that way.
I don't hang around with breastfeeding zealots -- I'm too old now to be in the demographic really but when I was younger I just avoided getting drawn into discussion about it with people who I knew took a hardline view. But its very hard to avoid it
But I think putting this down to "everyone gets offended by something" is willfully misleading. There's a specific section of society which seeks to "educate" women about breastfeeding in a fairly zealous way and the right to proselytize about breastfeeding seems to takes precedence over the feelings and circumstances of people on the receiving end. This way of thinking doesn't take into account the very many variables and reasons why people don't breastfeed and assumes that failure to breastfeed is basically tantamount to negligent parenting. In some ways the closest analogy is to religious evangelism: its the belief that your argument gets to be heard over all other points of view and at all costs.
This is fairly unique to the breastfeeding debate. Look at another highly emotionally charged debate which you get on here all the time: the working mum vs SAHM debate. This often gets very heated and sometimes quite nasty on both sides. But there's a basic acceptance on both sides that no-one has the automatic moral high ground.
Even those people with the strongest views will acknowledge that their worldview doesn't work for everyone and there isn't a "one true way".
The breastfeeding debate is equally charged but different in that the pro bf lobby assumes that it has the moral authority over the argument at all times. There is no quarter given to people who struggle, who compromise or who just switch off and no attempt to take account of the broader question of health -- including the health of the mother. So no attempt is made to listen to the people who don't breastfeed and engage with the reasons why they don't. It's just "here's another study that proves why we're right". A bit like someone finding another Bible verse that proves something.
However vehement people's views are as to whether women should work or not, you rarely get people posting studies on Facebook that show the effects on children of their parents working or not. It's accepted that this is subjective, very difficult to quantify and highly likely to upset and irritate people.
For some reason, bf enthusiasts have no such filter or self-awareness. And it appears not to cross their mind that a very large number of people reading their posts will be upset by it. Not because they are professionally offended or "paranoid" but because they all have a personal story of not being able to breastfeed and reading yet another screed that shows why they were lazy or feckless or didn't try hard enough makes no difference.