Someone in a writer’s group posed the question – Does your main character need to have an intense motivation for something? What does your character want? The Op’s dilemma was that her character didn’t want anything – until the end.
It seems to me lack of clear motivation means the character is on a journey of discovery. Perhaps the character is running away from something rather than running to something.
That’s perfectly legit and quite good as long as the ultimate goal is hinted at along the way. We need that trail of breadcrumbs. The end goal shouldn’t seem like something pulled out of thin air. In the end, the reader should feel that what the character finally wants makes sense, given their history.
My characters have strong goals. In A Misalliance with Love, Rosie needs a home and family but has a burning, almost crippling desire for independence. Sinclair Talbot wants validation and esteem.
In my next book, Guinevere wants family, stability, and appreciation. The Duke wants hope and love.
Characters are motivated by their desires even if they do not yet know what those desires are.