I met my lifelong best friend in pe swim lessons as we were both so poor at it we were told to sit at the side of the pool all lesson. (My son has had swim lessons since he was 5, I'm not letting him go through the same experience).
I hated the competitiveness, the changing in communal areas, never having good branded kit (poor family), never being chosen for teams, pe teacher ignoring me all lesson and then writing in my school report that I never joined in.
My son used to love pe until year 2 and it just seems to be about football now. He has ASD and although has friends the boys who play football at playtime stick together in pe and he gets chosen last. He hasn't a clue how to play.
He loved it when it was gymnastics, breathing exercises, stretching and sprinting etc. He sees already that if you don't excel at a team sport you get no attention.
In fact at a school activity day he went to take a penalty shoot out turn to win a football and the pe teacher said 'hello master frogsbreath' in a very formal way and I was furious. He mocked my autistic son's formal tone and intonation in front of everyone. If the pe teacher thinks it's ok to mock those who aren't good of course the other children will do the same.
I told the pe teacher my son prefers to be called his own name 