The problem with Riots anti-cheat (at least to me) was that it runs all the time not just when you're playing the game. This is completely unnecessary and a pretty huge security issue.

They've sort of fixed this now by letting you disable it, but it requires a reboot so I'm still avoiding Valorant for now.

It’s usually down to the game developer to implement features like that.

Ah, you're a vendor of the product, not an in-house shop. Makes sense makes sense.

I've not had issues with cheaters on Dots 2.

Assuming you mean Dota 2 I haven't played for some time but it used to be somewhat common 3 or 4 years ago for people to run scripts to instantly cast hex as soon as opponent appeared on their screen this effectively gave people inhuman reflex times.

You could tell they were cheating because if you watched replay from the cheaters point of view their mouse cursor would jump from current position to hovering over the target instantly and then immediately jump back to cursors original position all within a frame or two.

It is still a problem, although admittedly I haven't seen cheaters myself. Valve will soon™ take Overwatch's replay analysis aproach[1] for anti-cheating, though.

[1] https://blog.dota2.com/2020/11/upcoming-updates/