This sort of aimbot that is in OP's post is almost instantly banned since it's a memory aimbot. Trust me when I say the only undetected aimbot out there is utter and complete shit. I tried it for a game and its worse than my real aim even after tinkering with it for 2 hours to get the settings perfect.

So no, these pros do not use the absolute shit that is referred to as "aim assist" because its immediately noticeable and not smooth whatsoever, and also because it gives you barely gold level aiming and most of them require you to have hit your target once because it uses the healthbar to aim at them, so if they're not hit, there's no hp bar and thus the aimbot is worthless if you can't hit your first shot. Which is another tell of someone who uses it, if they can't hit you for a long time then all of a sudden their aim is insane once they tag you once? You know its aim assist.

Don't think "Boss" up there will be around for long, most likely 1 week at the most if he's using the chinese memory aimbot I think he's using which already got almost 7000 accounts banned in China. So its already detected.