Overall I kinda agree. You do get the special hookup as cheerleader/footballer after football games, but there isn't really any variety to it so it's mostly to see once. Besides that:
- I am not sure to what extent sports are supposed to be interactive in competition. I only did a very short playthrough with esports, but I have done longer (4-6+ months) ones for football, cheer and swimming. The only actual choice elements I can recall coming up was deciding whether to push or not in swimming competitions. I don't remember ever getting any options in competition for either cheer or football.
- Swimming has two special scenes relating to swimming nude, first with the coach and then the whole team. Feels like there should be something where the coach tries to fuck you from how the game talks about them but I never get anything to come up. Also never have any other interactions with actual swimming team-members - IIRC one of them is a special character right, I don't get why I have had literally 0 scenes with them.
- Cheer and football practice had some small things but nothing remotely sexual for football. Some flashing and such for cheering.
- As said I barely did much esports, but IIRC nothing happened in my short playthrough there either. Somewhat more understandable but even if some content is set to be delayed so you don't exhaust all special scenes in month 1, it seems unreasonable for NOTHING interesting to happen early on.
Overall I feel like I probably missed at least some content in these, but I have no idea how to trigger them and frankly I think the possibility of playing for months in-game and never having it trigger at all isn't reasonable anyway. If I didn't miss anything substantial, they definitely need fleshing out.