The goat - Lionel Messi?

I’m going to be honest here - I know next to nothing about sports, and that includes soccer/futbol. From what everyone says… this guy is apparently the best sports player there has ever been to play any sport. He pulled off a hat trick, aka scored 3 goals in one game (lowkey, a funny name). Okay, but like, people actively root against the Argentinean team? Make it make sense.