What is she so upset about? Usually women resort to violence if they feel all previous forms of communication has failed. Toxic people / narcissist / emotionally immature people have this idea that "you hurt me, so if I hurt you you'll understand how you've hurt me." The way you've hurt her could be as little as failing to meet expectations she never said or you trying to leave her. To them, they never wonder if their behavior is wrong, they believe you deserve it. And since you continue being with her, they think its fine. And you might still be doing whatever she is punishing you for.

I know this because when I was a teenager and my mom wouldn't listen to me, I would escalate until I was screaming and crying, while she ignored me because I was the crazy one with emotional problems. To any outsider I looked like the one with aggression issues, but I was a hurt and misunderstood child. My friend pointed out she was wrong. As the adult and mature one, my mom should have listened to me, and she should have de escalated the situation. Helped to control my emotions and have empathy instead of punishing me and letting it get worse.

As the more mature one, you should see if there is some way to deescalate the situation. She's gotten into a cycle of expecting you to stonewall and defend yourself if she hits and rages at you. Especially in other cultures, there are expectations that when a woman hurts you you should ask her whats wrong instead of defending yourself. As an adult I learned I was raised with that expectation, but most healthy adults don't run towards danger. They see you attack them and they attack back. It takes a truly big person to get hit and ask the perpetrator "are you okay? We are on the same team. Is there something I can do to make you feel better?" And actually this will get you what you want, because it stops the fight or flight in her head and gets her to pause and calm down and consider your needs.

In relationships, when you put the other person first, they put you first too. But when you defend yourself, they lash out harder. Once she is in a calm state and you've reassured her you want to help whatever is bothering her, then you can untangle whatever she is really upset about. I know this is contrary to most peoples advice to just run away and protect yourself. But honestly id say at least 50% of people in this world are toxic and immature so its better to learn how to deal with them than to just keep running away, especially since you do love her, so its possible to learn what makes her tick. There are many relationship books out there to teach you how women think and how to de escalate conflict. You won't hear it from reddit because common consensus is to break up. I know it's really hard to be magnanimous right now, be the bigger person, think about the bigger perspective and what cultural influences might be at play, especially if you feel depressed, alone and like a failure. You are not alone. Many people go through conflict in relationships. Read as many books as you can and you'll hear hundreds of stories of how people suffered like you did, or improved things, or gotten away. Right now you don't have enough knowledge to get what you want, that's all. You are not bad or defective. You can overcome this and get what you want out of life. Calm down and take care of yourself. Eat well, exercise, take care of your sleep, so that you can have the best possible chance of success. You are deserving of that.