I, The Female Protagonist With Superpower, Am Super Fierce (readlitenovel-com)

She was born into an affluent family, but she was swapped at birth and got a different life. She grew up in a village. Just as she got the opportunity to transform her life, it got taken from her, and she was forced into a marriage to trade for a marriage for her mentally-challenged big brother. In the end, she died t…