To put another perspective on it, my mother FF both me and my sister for no reason other than she didn't want to BF.
I don't look down on her for that. I'm happy with her decision, and I was the baby fed the formula. I've grown strong and awesome on formula
I FF DD, due to low supply, and in the early days I absolutely beat myself up over it - especially as there is a lot of propaganda out there to say that low supply 'almost doesn't exist' - which made me feel that no one believed me. Even well meaning people insisted there was more I could have done. Well, I did everything I could do, and DD has grown up to be healthy, intelligent, and developmentally ahead. Next time I'll try to BF and, if it doesn't work, will try not to be so hard on myself about it.
I guess the way I look at it is that the people who are judging you, and feeling superior for their success in BF, must not have an awful lot else in life to be feeling successful about if that's what they're using as a thing to push others down and lift themselves up. I used to let it get to me, but now I feel sorry for them. They're the insecure ones at the end of the day.