It's ok, you don't understand. You likely never played professionally. That's understandable as you lack insight to the games mechanics which made it good.
Glitches are illegal in leagues. I remember one match I had with a bunch of halo 2 players from gaf where we lost a game because someone dropped the oddball through the floor on warlock (this was on CAL-O... Open league had people who cheat anyways, same with CS until I became CAL-i) .. So we did have to spend time talking with cal officials and showing footage to show what happened.
But when the glitches are subtracted from the game and its played competitively (like in leagues) then it's far and above the best halo multiplayer game. That's what people were hoping from halo 3 and ended up being just an ok game. Then reach came and it's MP is kinda mediocre.
But keep being ignorant.
Do you think CS is cheat free? You think there isn't people who moderate their footstep speed to walk almost as fast as normal speed but don't walk fast enough to make sound? You think people don't texture swap levels and player models? You don't think people use aim bots? All the most popular online games have problems.
I'm gonna have to call bullshit without a handle, team name, and steam ID.
As an ex-cs1.6 player the general complaints about CAL admins are justified as it was in who you knew and what admins you had connections with that would get games overturned even with clear replay evidence disproving the violation.
Ringers were rampant and the only CAL admin I ever ran into who had the balls to ban ringers was Trembly.
Plus anyone who had any basic concept of how to read the config file could figure out what you did to try to get around the rules.
And what about movement glitches in CS1.6? I'm not aware of any online leagues that banned crouch running/hopping as it was considered an obtainable skill used by almost every top level pro out there. Just like the BXR in Halo2, an unintended glitch became part of the game and those who could, did and to great effect.
There are glitches in almost every competitive FPS that were abused to no end. That doesn't mean it made the game any better for competitive play.