Inter has the best team in a decade yes, but results aren't automatic. He improved Inter something like 15 points from the previous year in his first season. There is basically no talk of "adaptation period" with Conte as with other coaches.
Who are the best coaches in the world? for me Allegri, Pep, Klopp, and Simeone. Let's think that Conte beat the first 3 to a league title with underdog teams. He is the only one I can imagine doing so in such a consistent manner.
Pep spends a billion but doesn't win CL and loses leagues to Ranieri and Conte, Klopp takes 3 seasons to win the PL, etc. All coaches have good and bad things.
Conte's personality is so off-putting that it diminishes the perception of his level as a coach imo.
Its really difficult to say who’s the best manager in the world, or make a top 3, because we simply tend to watch the sportive successes they’ve brought, while winning trophies isn’t possible with every team.
Yes, Conte made Inter stronger and is a better manager than Spalletti is. But equally important, he’s one of the best paid managers in the world and he can’t survive the group stage. And it isn’t a ‘one year incident’ as he failed with Inter and Juve at CL level. It brought Inter right back into financial problems.
Besides that there is the technical/tactical part where Conte really failed. For me it’s really hard to see that a manager with his career refuses to change his tactic, not even a small adjustment compared to his first season here. He’s the definition of a one trick pony.
For me a manager should be able to anticipate at certain situations, surprise the opponent, try something different when needed, etc. I’ve seen Inter dropping points against the smallest teams in Serie A last year because Conte continued to play with 3 CB’s and it ultimately costed them the Scudetto. Yesterday again, same story different day; they were dying for a goal but as always it was the same plain 352, he’s as stubborn as Sarri is, but has a different philosophy.
If he had the same sportive results at Juve with our standard nowadays people would riot in front of his house. I don’t see him as some random Serie B manager because he has enough qualities to fight for the competition, but all things together I certainly don’t consider him to be world class. And I’m ignoring his behavior while discussing this.