Question about the skill levels

[Fate]

i'm just wondering, if vermi still plays FPS and twitch-based games regularly then why isn't he even 5% of his prime form? does CS GO make you that bad at FPS? i wouldn't question.

AC and CS are two completely different games. They're both FPS, sure, but the gameplay is totally different. The pace in CS is much, much slower and the style of aim required is also totally different. For example, in CS you need your crosshair to be at head height at all times, and 90% of the time you need to be completely still to be accurate while shooting.