There is a youtube video about how even with the "best" anti cheat valorant has a huge cheating community. They are using ardruinos and secondary pcs to ai recognise the other players and simulate a mouse input via usb. (this is the high end cheating with a high cost) and even simple anti recoil scripts are possible without extra hardware.

Edit: https://youtu.be/RwzIq04vd0M?si=4-iedk11nU6W7wUu