@Cyeo123 Yeah it was the same in mine too, although I am a guy and had this with my wife. I went through the whole maybe it's bipolar but I know bipolar and it's not the same. Difficult and prone to explosions but have empathy and are remorseful for their actions after the fact.
In my case I found it had been same throughout their childhood and I wasn't the only one who received that behavior. Now, everyone in our lives have been disowned, deemed inferior or a problem.
It was very much like two personalities, one who adored you and one that hated you and at first it was months apart then it became daily, hourly. Never knew what mood were in or how the day would unfold, didn't matter what you did even nice thoughtful things, it would explode and the problem was me in some way.
It's emotional and psychological abuse and the end result is you question everything, your reality, yourself and what's wrong with you. Why does this person treat me this way, it must be me. It's not you though it's them. It doesn't matter how much you change it will always be the same result I found.
As PP said you need to look at his past and yours. If you are like me, I was shy and quiet and grew up with chaos and that relationship felt normal. However, it's not normal, it's toxic. I have never experienced a true genuine relationship without some form of chaos and I understand that's why I ended up in that situation.
Don't let him wear you down it turns your head inside out. You are not to blame, you are you, he does not want you to be who you are but some character he deems you should be while not changing himself or talking responsibility for his own behavior.