My own mother gave me horrible advice! I don't know how us kids ever survived, things like oh rub alcohol on her for the fever. Or better yet bundle her up she is hot. I just calmly told her that those things are no longer recommended, of course I got the "you survived fine!"

I am sure it is hard to stand back and have no opinion but when it becomes condescending or demeaning that is just uncalled for and you need to put your foot down.