I definitely understand that frustration, but there is something to be said when considering that "fated love" does exist in these kinds of books and though they've changed the story a bit, theres no gurentee the story won't find a way to get back on the right path where the ML falls out of love with them and in love with the "destined love" - FL is just trying to protect herself from more heartbreak than she already will have should the book get back on track

One thing I’ll never fully understand is why FLs think the ML isn’t theirs just bc they reincarnated into the story. You’ve changed the story at so many different points, kissed the man, had good intimate chemistry with him, yet u think he isn’t yours simply bc u still think of yourself as a reader. It’s makes me so frustrated seeing ts bc just open ur eyes and it’ll avoid both sides getting hurt!