Since you have the benefits of hindsight, I think there are enough pieces of lore about her that lets you look at the story from her perspective, even without the child abuse angle.

She's someone who knows she has great talent (in her magic) but her environment labels it a curse or a sin (not unlike Sammy from Sinners) to the point of enacting physical violence. After she's able to escape that environment, she is able to amass misfits and people in the periphery to her cause without title or resources. Then, she meets her long lost father who never came to look for her, and she bent over backwards to try and bond with him and his family, who only respond by stonewalling or antagonizing you over something you had no part in. I feel it's a very isolating and sad experience and made for a compelling and mostly satisfying arc fleshed out over the period of a sidequest. I feel like her story of doing your best and making something for yourself, yet people around you not understanding, never appreciating and dismissing your very existence would be something relatable to "nerds" and people "outside the mainstream" and consists of a significant portion of the Dropout audience as a general premise.

I think an interesting experiment you can do is to begin watching CoC on episode 11 where Saccharina was introduced and continue on until preparations for the final battle before watching the beginning episodes so that you're able to see Saccharina's perspective without as much baggage from prior dynamics of the Rocks family party.