So is she practically perfect and flawless?

One thing I noticed about people who micro-criticize and talk down to others is that they have just as many flaws.

It's a strange thing because you would expect a near-perfect person to criticize you. You would think that she would have more right to do so.

But I've seen it in my own circle too. It's not the relative who has a perfect family that criticizes another relative's dysfunctional family. It's always the ones with dysfunctional family that constantly criticize someone else's spouse, children, parenting skills, and home...and give tons of unsolicited advice as if they are the experts.

But I am glad you are setting stronger boundaries, to let your friends know that their behavior is unwelcome. Hopefully, they will become more self-aware and less critical of you over time.