Hazards of Time Travel

A lot of people seemed disappointed in the ending, but I was okay with it. Maybe I just didn't have a lot invested in this book because I don't think there was an ending that I would have hated. The main character really rubbed me the wrong way at the beginning...she seemed naive to the point of stupidity sometimes at how she just didn't get the gravity of the stuff she did. I tried to think back to when I was a teenager and whether that makes sense but I wasn't really that rebellious so maybe I'm the wrong person to ask.
I also wasn't a huge fan of her love obsession but that's something I could more relate to as a teenager!