The serious cheats in competitive games these days don't rely on hacking the game anymore. They use a separate computer connected taking your HDMI out as an input and then controls your mouse and keyboard inputs. They use ML models and OpenCV. You watch the second computer's monitor and it draws huge boxes around things you shoot and it assists your aim. It doesn't even have to be a PC game, you can do the same with consoles and a computer.
Kernel level anti-cheat is meaningless.