I cannot imagine what sort of tantrum and toxicity he has created in the past two years because we did not sign Neymar back. He even admitted that he demanded the board to sign him. Messi as the case with many latinos unfortunately due to nurture probably have huge attitude issues. Riquelme and Rivaldo were divas who disobeyed their managers.
That is borderline racial stereotyping. The Latin temperament. Give it a rest. There have been plenty of Argentine players in history with ice cold natures. Zanetti for instance. Los Pumas, Las Leonas etc etc Luis Scola and Manu Ginobli. A real group of hotheads. Messi comes from a stable family and even those like you have just disparaged like the magician Riquelme who came from a troubled neighbourhood in BA settled down and never gave the manager any issues.
Maradona called Roman's style unacceptable so he quit the Albiceleste. van Gaal did not want to play him as he was not his signing so stuck him out wide. Riquelme just wanted to play football in his central role so moved to Villareal with great success.
Any manager with sense always builds a team around it's strengths. The fact is Barcelona have stagnated. A misguided transfer and youth policy and managers failing to accept that Messi cannot as he gets older do it all on his own. He needs mobile players around him, who can track beyond, provide genuine width and a playmaker who can take the burden and focus off him. Scaloni with Argentina has realized this and allows Messi to play where he is still lethal in the final third with plenty of dynamic players around him.
Messi does not deserve people like you sniping at him with stupid comments as if he cares. If he has any sense he will move to a club where he has a chance of winning a CL because the current mess Barcelona are in will take with the financial crisis created by the coronavirus at least a minimum of 2-3 transfer windows to rectify.