I just personally don't like stupid and naive protagonists. I'm sure other people could love the story but the naivety kinda ruined it for me. I didn't feel like writing a review because it's not actual criticism and is just a personal preference.
The people who give your story 1 and 2 stars are doing it for the same reason I did and it's because despite the MC having read thousands of books she is so offensively stupid and unfathomably naive that it for ME sucks the life out of all the great things in the novel.
I don't know if you should change it or not, I'm not an author so it's best to do what YOU want.
Also, I'm only one of the 4 bad ratings you have among almost 100 good ones and you are in the top 2% of the website so you really shouldn't stress yourself over a very minimal amount of bad rating. Lots of people love this novel and it shows.