I've seen people refer to her hard childhood a few times. Was she sick as a child?I'd wonder how much of the behaviour she publicly shares with regards to her children is as a direct cause of her own childhood, which wasn't easy.
Don't know if she's been to therapy or has gone since she's had kids but I think it would be hugely worthwhile for her.
If that's the way she's happy to portray her parenting online then I'd wonder what goes on behind closed doors. Kids aren't stupid and pick up on subtleties.
Not saying that she needs to be on beaming every single day about how amazing/fantastic/wonderful it all is (when it isn't) but I can't ever really recall her saying anything good and positive about the kids, which in itself is hugely harmful.