As someone who runs an online Counterstrike platform, I can attest to this firsthand. There are literally dozens of open source cheats on Github that bypass the major anticheat services. And when one gets detected, they're usually updated in just a few days. For private paid cheats, they're very rarely detected. I've heard of people paying thousands of dollars for custom-built cheats that have gone years and years without being detected.

The cheating in the game is out of control and has been for half a decade. People still play and can find little pockets to play in to avoid cheaters (namely playing with friends or on paid services, that cut down on cheating due to the barrier to entry of cost), but it's inevitably unavoidable to consistently run into cheaters

My approach has been to run no client anti cheat outside of that built into the game (VAC), as I don't believe invading people's privacy (e.g. always-on kernel level detection) for the illusion of reducing cheating is worth it. There are better ways of hindering cheating than on-client detection, in my humble opinion.