I believe it was modern rebirth novel. The MC's half sister got everything, and her mom was kicked out. The mom was living with her brother's family where the SIL and the daughter bullied her. Eventually the MC humiliated the cousin publicly at her grandfather's birthday party. That's all I remember! I think it was one of those 1000+ chapters novels. Thanks in advance!! ^^
Miracle Doctor, Abandoned Daughter: The Sly Emperor's Wild Beast-Tamer Empress? IIRC, in the beginning, she lives with her maternal family who refines iron. Spoiler I think this is also the story where she goes to a bigger village for a competition to decide who will refine iron for the country, and while traveling there, she meets ML. In that village, she also becomes best friends with another girl who happens to be the daughter of the man assigned to govern that village (by the military). The governor adopts MC as his daughter, and the story moves to the capital. MC messes with two of her siblings, but the third and youngest is too high above her for now, so she must keep training. I think she's an alchemist as well as a cultivator IIRC.
My new bad wife is a little sweet. I am not sure though https://www.novelupdates.com/series/perfect-secret-love-the-bad-new-wife-is-a-little-sweet/