I remember trying to install Valorant for the first time, and its ridiculously invasive anticheat kernel mod (or whatever it's called) gave me my first blue (or was it red??) screen I'd seen on Windows in years.

Immediately uninstalled it and haven't ever played Valorant to this day. Fuck that crap, if your community is so toxic that you need a rootkit to keep cheaters at bay, then maybe it's more of a community problem than a technological one. And yes, if this means that you have to block all of China in order to do so, then that is still a community problem. Put your rootkits on your Chinese servers, separate them out, and let the cheaters fight amongst themselves.