Move far enough away you only have to deal with them when you want to. (Assuming they aren't assigning remote support tasks.) I was surprised how drastically

Move far enough away you only have to deal with them when you want to. (Assuming they aren't assigning remote support tasks.) I was surprised how drastically my relative's behaviour changed when my presence was conditional on me wanting to bother to drive for a couple hours to see them. Between biting ones tongue and not seeing their son/cousin/nephew for the next five years they picked biting their tongues, mostly. Your mileage may vary.