Your options as the partner of a passive-aggressive
Passive-Aggression is a personality trait that can be quit mild and even adaptive in certain situations. But, it also can be quit severe and deeply entrenched which makes it very toxic to the partner. Truth is, if deeply entrenched, it is very difficult for the passive-aggressive to change even if they acknowledge their passive-ahgressiveness and want to change.
Most of the time, it is a matter of the partner first discerning if they can live with the passive-aggressive behavior or not.