Why do people come down on a woman that doesn't breastfeed?

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I only breastfed my child for two months and after that I dried up. I had some people (including my mother-in-law and sister-in-law) constintly tell suggest things to help me bring my milk back and would always want me to talk to a doctor about and basically make me feel bad because in their eyes I didn't "try hard enough". Both of them breastfed their children for at least a year or so, so my two whole months wasn't of course good enough in their eyes. Besides that, what if I just didn't want to breastfeed? They make formula that is good for babies so why is it considered a crime to not breastfeed? I do understand the importance of breast vs bottle but at the same time, in my case, there was nothing I could do about it. I always had low milk supply and from day one had to supliment with milk. I feel that I tried my best. And my boy is healthy as can be. He is now 11 months old and just recently got sick for the first time. So why do people (mostly other women) judge women who don't breastfeed???