Yes, MM had a bad experience, and it obviously caused her sadness, fear and even anger at the time.
I do feel sad for her.
But she is a grown up. She does not have to use these feelings to publicise criticism of other women who don't feel embarrassed to bf in public. It's called being mature and getting over yourself and realising the world does not revolve around you and so on.
The story she tells about the woman who breastfed on a long train journey beside her, who was a 'real lady' because she used a pashmina and no one even realised she was bf - I think this is made up. A pashmina can be helpful, but it does not totally stop all views of breastfeeding unless you have a very compliant baby indeed. If it happened, then this mother was just unusual with her baby and her pashmina-and-breast manipulation skills.
These constant demands to be discreet, to use pashminas, not to let anyone see anything, put huge pressure on mothers.
And I thought she was against putting pressure on mothers?