Competitive scene is still around from what I can see, just maybe in different games than you are used to. To be fair stuff like Starcraft 2 has drawn some of the attention away from FPS.
The main game I still play (Quakeworld) is almost exclusively driven by the competitive element, basically the whole scene revolves arond 4v4 TDM with occasional duel tournaments and then some casual 2on2/FFA on the side. Even the development of the game (now community maintained) retains a competitive element in terms of the sort of features that get added. For a game that is so old, it is surprisingly advanced from a feature standpoint and has a huge array of configuration options that people tweak for competitive play (as an example, my cfg is around 130K in size).
Obviously, the scene is smaller than it once was (only around 30 active clans) but I suspect this is the case across many games. I think QW probably has the best setup for competitive play though; according to a clanmate of mine who plays Quake Live for the UK team, QW is ahead of it in that regard.
Surely there must still be a big scene in CS1.6?
I wanna get into quake world, On my quake on steam If i right click it has quake world, but the colors are all messed up, im guessing that version on steam is outdated anyway?