Living with a bipolar partner can be very traumatic. All conflicts tend to be extreme. Whatever you are doing is completely wrong. You don’t deserve any credit for anything. No matter what you have done so far is never enough.
Then after that comes the change. She is so sorry for what happened and what she has done. Then there is a slight chance that you can agree on something. This agreement she might keep or not. But the that is s good start.
Once this pattern has repeated itself enough often. One start to adapt and create strategies for handling it. Eventually however it gets you and you can give up talking about your needs since they are not acceptable if he/ she does not feel well or is frustrated for one reason or another. It can be a family quarrel with a mother or something at work. You will have to carry the burden of that by being the target of aggression and merciless criticism for something completely different like putting the children to bed too late or in the “wrong ” way.