I would mention how 8 out of 11 starters for Argentina have no business in any top division of football, literally Segunda level players (including Mascherano).
But that's only half the story. The tactics and formation were absolutely rubbish by Sampaoli and there is no gameplan on how to attack and move forward, nor any structure to the defense. Look at how Iceland have overperformed in the past 2 tournaments to see how much tactical discipline matters. The cohesion of the team matters and without that, even the very best players cannot make a difference.
It's like if Neymar had played in that 7-1 loss to Germany and everyone started blaming him, despite total systemic collapse.