I’m not a huge football/soccer fan, but I love the concept of promotion/relegation. Around here if you have a losing team you get rewarded with a high draft pick. It’s a strategy to be terrible.
I also would love having lower level teams to watch, but that’s pretty rare. If you have a pro team in your city, you probably don’t have a semi pro team with the exception of baseball.
Maybe that’s why so many people enjoy watching college sports. Although I have my own issues with that scene, because of course I do.