A family member has an infuriating way of discouraging any criticism. For example if someone asks this person to not say something to one of the children because it's likely to be quite damaging and may affect their confidence, the person will say something like "oh yes, that's what I always do, I always say things wrong". It maybe sounds quite innocuous, but it does grate a bit after 30 odd years of hearing it and it actually works well as a way of making sure they can say what they want with impunity.
I just feel like I would like thjngs to change and if anyone has any suggestions of how to respond, if possible without starting ww3, I would be so grateful.