I don't agree with nitpicking.  There's no call for it. As I said, this is just people targeted because someone is upset about something else.

For instance, I'm older and balding, so my relative had made some comments about hair - because she has issues with me on other things that she won't directly mention.

So, if people truly like someone as a friend or at least with any respect, they won't nitpick everything about them.  That's something you see when marriages or something similar start to go downhill.