If you're ever on the wrong end of this squad, it's a hard fight. 6 v 6 feels like 6 v 8, and all of a sudden what you once knew no longer holds.
Routes close, sightlines and chokepoints are death traps, air support rains down, and it starts to feel like a 6 v 12. Your sharply honed skills lose their edge and rust forms upon them in only a few minutes.
At the top of your game, facing this bunch, you fight to go positive.
Imagine being on the losing end of this game after game.
imagine being an "adequate" rusher, or even a good rusher.
Imagine facing a 6 man wrecking crew with the intention of rushing, and then being popped back into reality, with no viable means to make that strategy yield any degree of success.
You move, you die.
Natural instincts kick in and you go into self preservation and become more cautious, at which point Alpha lobbed a stun your way, homescrub simultaneously blasts you from the side with 3 spas shots while shadow is spraying you face with an MP5, and kaz just dropped a cooked grenade at your feet.
You can't survive. Movement results in death. More caution ensues.
More destruction results.
Final option, become a security camera and try to mitigate the damage because this 6 v 6 feels like a 12 gallon enema with a firehose.
I'm not justifying the resulting playstyle, but I hazard a guess that some fairly competent players resort to laying up in a corner just trying to survive after the other strategy(ies) have proven MAJOR failures.
Leave lobby or begin game in safe mode.
Camping is now the viable survival strategy.