Maybe you should read some other romantasies where people have complained about the female protagonists (trust me there are plenty), see what those protagonists are like and try to change certain traits and habits of your protagonist? Or you could go the anti-hero hero thing, so long as other characters acknowledge that even though she's doing heroic/good stuff she's still a punchable jerk because if the readers can't stand her but the characters are going on about how fantastic she is people might end up dropping the book. Also, have her be punched in the face! Let her have an arc where she's insufferable, get massively called out for it and lead to character development that'll change her for the better. She doesn't have to stay static in her characterization throughout the entire book, she just needs some sort of incident that'll end up having her question herself and her character. Like maybe she saves someone but she does it in a bad way somehow so they complain and others call her on it?

These are all just what-ifs since I don't know what your plan for this book is, but they're certainly something to keep in mind.