Obviously not. Barcelona failed to win much of anything with a just shy of prime Messi in the years right before he left. That team was a lot better, in a much less competitive league than Luton.

Prime Messi didn’t win La Liga every year, alongside some of the greatest players in history.

He’s not gonna win the league alongside Ross Barkley.

Clearly not.

Teams win trophies, not individual players

He’d probably keep them up, but I’d be surprised by even top half tbh