I can't blame a team when the game matchmaker is so bad and pits overpowered players against weaker ones who play well, and try hard, but ultimately can't succeed. If they shoot, but miss, it's not their fault their opponents are superior.
I DO blame the team when nobody touches the objective, nobody paints any terrain leaving the base immobile and indefensible, and when you see aerosparays shooting from sniper perches at the splat zone. Or when you're alone defending the base and 2-3 enemies are coming in to flank/ sieze it and you wonder just where your team was, when all of their opponents were alone with you. That's when you resort to: