Valorant's anti-cheat is very strong indeed. They pour a ton of money into it. My tests show that the technology uses a method to detect the distance between targeting endpoints. I think it works, some sort of cumulative effect, above which threshold the antichit issues a lockout. The only option to play with mouse and keyboard is to use sticks for movement and for vision, and aiming shooting with the mouse.
This can be achieved if both keyboard and mouse have stick. In my opinion, the only adequate way to bypass this anti-cheat is to use a gamepad with a gyroscope (using ds4windows + remote play, you can activate the gyroscope).
I hope that reasnow will hear me and direct their efforts to create support for gyroscope, either purely through s1 or with ds4windows.
Basically, reasnow, you only need to add flickstick technology (directing your gaze to where the stick is pointing).
I apologize for my English