Hated, no, despised PE.
Didn't like having to go out in the freezing cold in not enough clothing.
Didn't understand the rules of most of the games we played and never managed to pick them up. Or any skills. I still have crap coordination, can't catch, can't aim a throw. I was about 25 when DH told me that you don't kick a ball with your toe. I didn't know! Someone mentioned knowing what to do with your arms when running - I don't know this now.
Didn't like the way the more sporty girls would be really aggressive - e.g. Whacking ankles in hockey. Don't like typical "sporty" forms of encouragement which are basically shouting and whistles blown in your ear. All of this simply convinced me that sport is something to be avoided at all costs, and consequently I have never got into fitness as an adult.
Competition is no fun when you have zero chance of winning and I'm not a competitive person. I also used to get blamed when our team lost because I was bloody hopeless at catching the ball or I did the wrong thing in rounders etc. So typically I'd try to stay out of the way and then I'd get even more cold and miserable.
We didn't have to shower thank god but I used to hate the smell of sweat and mud and damp hockey boots. And the clouds of impulse in the changing rooms! When we did drugs education my best friend and I tried to bring this up as a risk of accidental solvent abuse but the teachers thought we were joking.
I quite liked gymnastics because I could do that, my teacher would come up and help me do bits I got stuck on and be nice and encouraging rather than just shouting "Come on! Yes! Get in!" etc. Also there was no winning or losing and it was warm.
DS loves sport at school because he likes running around, he says "we just get to play games".