I think there should be a tutorial about agent roles, because there are so many misconceptions.

Especially all the duelists that don't push site, never give info to their smokers and then proceed to tell you "I have more kills, you are trash" is too high for a tactical shooter.

My suggestion? The game should explain to the people what the roles in the game do (very generally). Although it might be necessary to implement bots into the game for this.