This guy is a blatant hacker. I believe he is hacking for the following reasons:

1. His bullets do more damage than mine
2. I didn't know he was there and he shot me when I wasn't paying attention
3. He always seems to not die when I am shooting at him, I NEVER MISS because I am the greatest CS:GO player of all time
4. He gets nutty shots
5. He peaks right where we are
6. I did better than him during warm-up, so he clearly toggled on mid-match
7. His USP-S killed me in 1 shot despite me unloading my Glock in his general direction