Messi made the decision with full consideration, he had personal reasons for rejecting the lavish offer from Al Hilal. Many people predicted that Messi would follow Ronaldo to the Arab League, but he actually made a decision that surprised everyone after deciding to join Inter Miami.
Of course it was a shocking decision, but Messi knew what he had to choose regardless of some ridiculous opinions about it. Inter Miami is a good team and he has considered everything before making a decision, so I think it's an obvious move for him who might need some support.
Actually, Messi wants to return to Barcelona because it has a beautiful history there, but Barcelona has not made an official offer for Messi. Barcelona are worried they won't be able to register Messi if their proposal is accepted by Messi, because Barcelona will likely only be able to register Messi in August 2023. The complicated puzzle regarding the destination of Messi's new club has finally been solved, Messi has also proved to all football fans that he is not a player chasing big salaries.
Financially maybe Messi will also get a decent salary at Inter Miami. I haven't heard how much his salary is per year, but I'm sure Inter Miami is a team that will only be a temporary shelter for Messi before returning to Barcelona. This season Messi doesn't want to depend on someone at Barcelona, I mean he was very disappointed in Barcelona's management a few seasons ago when they couldn't keep him.
He has promised to return to Barcelona, but I don't know if he will return as a player and retire there or will only come back after retiring from football. Messi's story in Europe is not over, I'm sure about that.