Otome isekai, thy name is negligence/regret kink.

8/10 so far. Writing is decent if a bit cliche, serious tone.

Summ: MC is the illegitimate child of a powerful family who spends her life trying to receive love. She is ultimately killed/sacrificed to the imprisoned demon which gives her family their powers - a demon which then sends her back in time so long as she helps free him. Revenge-focused, full neglect, redemption for family members other than the little brother seems unlikely. Romance is minimal, but there is a ML. Some found family.

7/10. Writing is weak, common sense is lacking in some characters, tone is more lighthearted. Cute but lacking substance.

Summ: Daughter of Duke is neglected by her sick father in her first life and ultimately dies at the hands of the emperor as part of a power play. She regresses, decides to save her father in order to save the dukedom/her life, and realizes her father actually loved her all along. No siblings, no revenge, very light neglect/father was sort of well-intentioned.