Lionel Messi joined Inter Miami 18 months ago, with the Argentina international since taking MLS by storm. The 37-year-old has been key behind the Herons’ transformation from one of the worst teams into one of the best, with Messi leading Inter Miami to the Supporters’ Shield and a new regular-season points record. With Andres Iniesta saying Messi looks happy at Inter Miami, the former FC Barcelona superstar seems to have found his team in the final years of his legendary career, even if this season ended with disappointment in the MLS play-offs. And another Argentina legend, Mario Kempes, has…