Have you actually watched this Argentina side? It is completely built around Messi so if it isn't working....
i have watched my National team for about 20 years closely, and it has been a mess for a long time.
Chaos, Bad management (Maradona was elected coach for instance), poor team selections, and the lack of a true playstyle & identity has been a big problem for a long stretch.
There is a whole lot of talent, but no organization, no balance, no fluidity and the defensive structure of the team has been left in a huge void after swapping the likes of absolute rocks like Walter Samuel, Zanetti, Ayala & Cambiasso which gave the team a robust base & its offensive freedom, with the likes of Otamendi and Rojo.
The balance is not there anymore and to constantly put the blame on Messi is a bit tedious tbh and not remotely true (apart from specific examples like the penalty kick against Chile in copa america, which was indeed a huge choke)
Ronaldo went out in last WC, and so what? is it his fault? what kind of babyback bullshit argument is that? its not even close to the actual truth. This is a team sport after all.
individuals
can make a difference (and big players often do) , sure, i agree, but there is limits to this argument and wether the responsibility lies on
one player in every freaking match.
There are far more important factors that make a team succesfull, and especially in big tournaments like the WC and so on. As a Juve fan you should know that, our team has been built on a strong identity and base for many years, not individuals. Just look at Germanys national team and so on, or on the extreme, Greece when they won with Rehhagel.