Sorry, not even close. In the World Cup he was abysmal. In CL non existent so far. How can he be the best player when he's a non-factor at the elite level so far?
He's very close to Gavi. A talented young player with amazing potential, that in time can become elite. But at the present, he's not that amazing as people believe, and the big games show it.
Let's see him back in the return leg of the Copa, and next season in CL, against the top teams.
Don't want to hate on him as he's still great considering his age, but... really not a great player yet past La Liga level. I'd say it's very likely he will get there in 2-3 years time.