true, they can't control the actual mechanics, damage, and cost for the weapons.
however this game is their job and profession. it is their job (they get paid to do this) to come up with ways to overcome the aspects of the game that cause issues for them and their team. the awp, since it's inception with CS, is a prime example of that. it's a 1-shot sniper rifle with practically unlimited range. for literally decades now, players and teams have been coming up with ways to get that awper off his spot, develop ways to get around him, and find ways to defeat him.
the aug, a powerful weapon that has a relatively low cost, is another one of those examples. it's in the game and there's nothing they can do about it. they, people who get paid to do this for a living, need to come up with ways to overcome it so they can win. the teams that do will be successful. the teams that dont, and complain, will not be successful