I stopped playing because I felt I could not trust other players, I was getting too paranoid. There were not that many blatant cheaters, but with closet cheaters, it's now very difficult to know if your opponent is better than you or cheating in subtle ways. It's a grey zone.

I guess it's the combination of a frustration of losing matches and the constant suspicion. I was constantly trying to probe things and watching replays, it ruined the game because I was always focusing on cheating.

Ultimately, I think most CS players don't really care about subtle/closet cheaters, so as long as they don't feel it, it's fine, the game keeps its high player count, so it's a good facade and valve is happy with that.

CS is a game I can really enjoy, until I couldn't anymore.