Oh Kristie, it is awful when crap like that happens. Does your DH support you with your parenting choices? If so then that helps. They sometimes back off when their are 2 of you to deal with, not just the tired mummy.

Using the term "bad parent" is disgusting, that women should not be allowed to look after other peoples children. Imagine all those kids in her care left to cry.

Be strong, it does get easier to ignore them, but I do know from experience that some days it is harder to handle criticism than others.