The funny thing is, during his career Messi played brillantly in different setups in different positions and with many different partners. When Eto'o and Ibrahimovic were there, Messi played on the right wing, afterwards he switched to the false nine. When Neymar and Suarez were brought in, he switched back to the right and after the former left played as a number 10 (like he always did for Argentina) or a second striker (only under Valverde in some instances).
It is Dybala who is too limited to his favoured position as a second striker. How exactly would you want to fit them into one line up? Dybala can't play on the left or as a lone striker/false nine. This means you can't play Messi on the right wing because it would solve no problem (Dybala would still have no place in the team). Playing Messi as a 10 as against Iceland requires Dybala to play on the right where someone like Meza gets picked ahead of him (is this Messi's fault, too?). Playing both as strikers is obviously not gonna work and would also bench Aguero and Higuain which again wouldn't get the best out of the squad. Messi out wide in a 4-4-2 would be madness and Argentina would sacrifice their best player to play a weaker version of him.
The problem is that Dybala currently only has one position which exists in very few formations (the second striker in a 3-5-2/4-4-2 or any other system with two up front). Of course he could also play Messi's current role but the former is clearly ahead of him performance-wise. It would be up to Dybala to adapt, yet he doesn't do it. So Messi's to blame for it? Or just maybe it is Dybala's fault for not winning a starting spot against Meza and Di Maria in a position in which he would clearly have the skills to shine at.
It would be perfect if Dybala was able to play on the right wing (at least as long as Messi is still playing) or in a midfield three in an Iniesta-type role. He has anything for it but doesn't do it. But obviously Messi is to blame because he is "incompatible" with him (despite working very successfully with players like Henry, Eto'o, Iniesta, Sanchez, David Villa, Pedro, Neymar, Suarez, Coutinho and Dembele as his attacking partners).