Yeah fuck gym class. I actually think it’s super important for kids to be active but the way it’s implemented, especially at the junior high and high school levels, is asinine. And your situation sucked, what a stupid amount of bullshit!
I was a habitual skipper of gym class from about grade 2 until I graduated high school. I’d only participate enough to get a D, and some marking periods I misjudged and got an F. The only times I didn’t try to skip were when we had the weight room, because I actually liked that. But failing gym class had exactly zero impact on anything in my life. My dad gave me the whole “I’d be disappointed in you, but I’ve learned not to have expectations so you can’t disappoint me” schpiel, which whatever, emotional manipulation was my parents’ bread and butter, so I didn’t really care. Other than that, no repercussions at all.