This is to increase awareness of how to tell someone is cheating since I feel like so many people still don't know how to tell if someone is cheating bc i am seeing alot of people still reporting legit players when they are not cheating.
Method 1: Most laziest method: (you can do during the match)
click on their steam profile, type rip in place of the .com like this: https://steamcommunity.rip/profiles
What this does is show you their stats. High aim rating of 93+ is most likely cheating. I personally have 85 aim rating (i was 28k). Donk has 94 aim rating. Most legit good players ive seen have max 90 aim rating. But if you watch their demo and they have bot movement, they are probably cheating.
click on their steam profile, type w in front of the steamcommunity like this: https://wsteamcommunity.com
What this does is analytically show where this player falls in terms of percentages amongst all cs players. It uses AI to display a percentage of the likelihood of this person cheating. The rage cheaters will be shown as 1-75% trust rating. This statistic is pulled from analyzing the players' ingame stats like how fast they react, how fast they kill someone after they pop up on the screen. If the numbers are green, its within normal range. If the numbers are red, the guy is most likely cheating. The most important numbers to look at are time to damage, reaction time, and preaim. Most cheaters who are walling will have these numbers in red.
You can also see what faceit level this player is. You can click on the faceit tab, its next to csrep tab. If the last time the player played faceit is 1-3 years ago and the player is low faceit level compared to their premier rank, this raises no direct red flags. If the player has played faceit within the last month or two and it was low faceit level with multiple games on faceit and the player is suddenly high premier rank, they are probably cheating.
This is what VAC 2.0 should be analyzing if it was an actually competent AI anticheat.
Method 2: How to actually accurately detect cheaters: (you need to do after game)
Watch the demo. If the player is preaiming common spots, he is not cheating. (If you don't know what common spots are, stick to method 1). If the player has insane god like aim but moves like a bot and their crosshair is mostly pointing at the ground most of the time when enemy is not nearby, the player is cheating. If the player spends most of their time looking at enemies through wall and is not close enough to be able to hear them, they are cheating. If the player preaims at a player in a non common spot without hearing them at all, they are cheating.
This is just a generic guide to catching cheaters.