i can somewhat understand the father being so obsessed with having a divine embroidery artisan in their household
with that kind of trash personality he would probably die alone and in a gutter otherwise
and once the mc blooms beyond her sister its open season on his ass
This seems... very melodramatic and the trunk-isekai feels so corny at this point.
The villains felt overly evil for no apparent reason? And not just the family either which was touched on in previous comments (sudden about-face from the little sister in 1 year's time after loving her sister for 10, the father's character in its entirety) but even the fodder characters.
Like it's one thing for the maids to not pay her any mind because they don't care, it's another for them to go into her 'dungeon' and step on the product she's making that is meant to be sold to nobles. Why? For the sole purpose of being angsty?
The whole thing feels so tropey, falling into so many cliches as if they're necessary check boxes they have to fill. I'm gonna go into this with an open mind though! Maybe I'll change my tune?
I feel like the author is trying to throw in too many things together, isekai aspect is an unnecessary addition she doesn't even use these memories. No reason is given for why she's treated like crap even before they found out she "can't" use divine embroidery. Her sister suddenly turned into a b**** is also something I can't understand. Oh man she's being saved by a man drawn significantly more attractive than most other characters what a surprise!
The story doesn't make much sense. Why would a noble treat his eldest daughter so badly ? Why would she hide her abilities instea of using them to enhance her living conditions ?
Just for the plot to happen is the answer.
It doesn't bode well for the rest of the story : good looking protector ex machina, OP power out of the blue, nice people suddenly swarming around MC.
Minor note (since I'm rereading): the furniture is not anything like Mediæval. It's 18th-century furniture (note the thin legs on everything and the outward curvature of the dresser; in the Middle Ages, they usually built them sturdier, since it would last longer (to save resources and labour) and survive moving from estate to estate (important land owners of the period), and the decorations would usually resemble either tracery or folded cloth. (I'm guessing the word used can translate as "mediaeval" or as "pre-modern" — and translators usually default to the former.) Actually, apart from the furniture, the clothing style the mangaka uses for this series is also basically 18th century (wigs were not a must, nor were wide skirts; it depended on time and place).
That said, her "dark" and "bare" room is neither (that's one large window, so even if the room faces North, she's still getting a fair bit of sunlight, and while the room doesn't have much in the way of comfort, it doesn't seem too lacking (unless there's no place to sleep) — so maybe the mangaka was just playing it by ear? (As an artist, I tend to pay attention to these things, but I'm no cartoonist or mangaka, so maybe it's a difference in skill set.) @Tynian
The chapter kind of suggests that the initial dislike is because Ewey doesn't look like her parents; and then her "inability" to do "divine protection embroidery" was the nail in the coffin. Additionally, according to later chapters,
their status depends on being able to use "divine protection embroidery" and the family's ability and status have been declining over the past few generations, so, rather than using her for a political marriage, they're taking out their frustrations on her.