I understand the set up, and that didn't bother me. Though there were a few times during the high school scenes I wanted to shake the FML and tell her to wake up. That said, the lead actress did an outstanding job of somehow making the main character cute rather than a doormat.
But then later, when they're in college, I legit wanted to stop watching because I was so irritated with how the main male character treated the main female character. The only reason I kept watching was to see if she FINALLY ended up with the second male lead.
BUT THEN!!!! OMG! The ending. THE ENDING!!! THE ENDING!!! The ending makes everything worth all the pain and struggle. I've re-watched the last several episodes a few times. Ahh!! It went from a 6.5 to a 9.5 because of the ending. Loved. It.