I read a lot of advice columns.
"What percentage of shared responsibility do you have in making a relationship work? ... You have to be willing to give 100 percent with zero expectation of receiving anything in return. Only when you're willing to take 100 percent responsibility for making the relationship work will it work...If I *always* [take] 100 percent responsibility for everything I experience - completely owning all of my choices and all the ways I [respond] to whatever [happens] to me - I [hold] the power."
Many to most of the letters to the advice columns, whether the writers intended the message or not, boil down to "Give me some magic words so I can make the other person do exactly what I want them to do with no further discussion or drama". This is true for romance, friendship, and family situations.
Whether the writer is in the right or not, the hardest part seems to be to get people to believe and then act on the belief that their power is limited to their own actions and reactions. That often limits people's power quite a bit to the options of
(1) learn to live with the behavior of others by changing one's response. For example, someone who is always late gets left behind for being late when the group gave adequate notice. Someone who is terrible with giving presents is politely thanked and all presents are donated or tossed.
(2) decide how much drama each round to tolerate before walking out/hanging up/otherwise disengaging, while hoping that the pattern of disengaging affects the frequency of whatever action gets the disengaging reponse. The racist family, the insulting romantic partner, and the overly chatty neighbor are told once that the behavior is unacceptable and then one disengages every time the wrong thing is said. One cannot stop someone from saying it, but one can decide not to stay for the whole drama.
(3) break off the relationship. It takes two to tango. If someone's behavior is really not acceptable, then adults can be cut out of one's life. Small children can be taken to specialists for the parents to learn additional specific actions for options 1 and 2.
Thus, the advice isn't "Take 100% responsibility for everything in the relationship because it's all your fault". The advice is more the Serenity Prayer: "serenity to accept the things I cannot change, courage to change the things I can, and wisdom to know the difference".