Well to make you feel better I have a friend who has a 0.8 gpa (around a 60 average overall). I hated physics too, it was the worst overall grade I've ever got in any subject (I got a 72).
I don't study at all but don't listen to that advice. I have a weird ability to remember stuff. I get an A- average and don't study at all. I wonder what would happen if I did. I could probably have been a genius lol.
Personally i liked physics it was a fun class when i took it. Some times it depends on the teacher to me when someone likes going to class they tend to do better it in but that just my opinion