How to emotionally detach from my mom

The last couple of weeks my mom has been nothing but short tempered, explosive and playing victim. And at this point I've had enough.

From my pov, I'm always good to her, I take her out for dinner 2-3 times a month and pay the bill. I always think about her when i do grocery shopping, at times i would bring her something home even if she didn't ask. I would help out with bills if she is short on money.

But despite all my efforts, she is still a hypocrite and treats me like garbage.

In her eyes, apparently, I am the one that treats 'her' like garbage. Because the house is always untidy and I'm barely home. So any logical person would argue that my mom causes the house to be a mess, well in her eyes she "needs to clean after me" and we had an argument a moment ago that she scolded me because her dishes were piled up and she is under the impression all i ever do is make everything messy when in reality I barely use our cutlery.

I live with her in the same home, but I work long shifts so I'm only home when sleeping or getting ready for work. I eat at work mostly.

What would you guys do in this situation, i think personally I am going to stop buying things for her permanently because i don't have to.. she really got me in tears like i don't know what to do