is it dead?

Game is fine and will always be fine. The player base grows almost each major and the pro scene is not dying at all.

I stopped playing like 4 years ago. I haven't touched it once since then lol

Yeah, this game will eventually die, but having so many cheaters is actually telling you that this game is currently flourishing. The lack of cheaters is what tells you that a game is dying.

to be honest cs source is only really used for garrys mod and other game patches at this point

perhaps xD i will die eventually but only time will tell. people still play 1.6 u know

Csgo is still played by millions of people every day. I wouldnt consider it as dead