Cs is a special case. It has a very nice pacing. And requires no storfisk knowledge to be watched, you can almost not have played cs at all and understand what's going on.
I think the finals could also be a very cool esport. With it's very short rounds and tournament format. Although a bit chaotic.
Apex Legends is great to watch as a spectator, especially when you’re able to get multiple points of view.
I’ve also enjoyed CS esports previously. I’ve actually never been a fan of the LOL/Dota/StarCraft spectating as I find that it makes for a terrible viewing experience, so ymmv.
It's less about genre and more about the visual clutter overload, which seems to get exacerbated with each update. Like the last character they teased literally places a giant cylindrical barrier and chains all enemy characters inside or it, plus himself. Now imagine 2 of those