Not sure it applies with CoD in particular but my impression is a lot of these games with super invasive anti-cheat went F2P which reduces the punishment of getting caught to wasting time. Combined with the no dedicated servers resulting in little manual admin being possible with new games you've basically created the perfect environment to cheat entirely for business reasons. So then they started adding things like requiring phone verification (not even just requiring mobile numbers but requiring POST PAID mobile numbers) and kernel level modules, making a super invasive PITA solution to a problem.

Personally, I opted out of these games, F2P already perverts most game design away from fun IMO. And despite all this crap it seems like people are complaining about cheaters more than ever, but maybe I'm just old now!