Sometimes when people criticise your parenting it's as much about being a bully as about what they really think about differant parenting styles.
Agree with that one. My old mothers group was ok, we managed to get along nicely with all our different ways of parenting until Glamour Mum joined the group. It was like being back in highschool with everyone trying to be friends with the pretty girl. Unfortunately for me I was the total opposite of her and was attacked numerous times by her for breastfeeding, cosleeping etc She was a good mum in her eyes she dressed her son in designer clothes from the US and had her figure back In the end I had to leave the group, just wish I had left it earlier. Make sure you get the phone numbers of the mums that you like, that way if you do choose to leave you are still in contact with other mums. Also have a look at your local ABA group as there is a mix of mums and it is great to chat to mums of older kids who have btdt with cosleeping etc.

This whole parenting thing can be so hard at times, it is a pity some other mums make it harder than it needs to be. There is some great advice in this thread