You can read the full story here, but volume 1 is currently up for sale on amazonhttps://www.royalroad.com/amazon/B0CW3HYKRQ

This is a slow-burn isekai story about a young girl named Siya who was born with a weak body into a world that only cares about Strength. Because of this, she isn't able to even use the only thing she has going for her, a knack for strategy, which is the last thing that the nation of meat heads seems to care about.

She faces many hardships and trials, struggling through abuse, grueling training, and seeing death around every turn. Despite all of this, she presses on, grasping at straws and using everything at her disposal to survive. Turning to devine favor, unique abilities, and even magic and dark magic later on, they each come with a new problem. As she finds unlikely friends, and deals with unthinkable betrayals, she struggles to finally stand tall and place herself in a position of power where her true abilities could finally shine.

This is NOT a revenge story, but that isn't to say the main character magically forgives people either.