He's playing the best tennis of his life right now and he has become tougher mentally as well. Staying at no. 2 and playing more finals will give him more confidence in himself, which might be exactly what he needs. He should believe he can beat anyone and win slams first. I'm sure if he stay at this level and ranking for another 6 months, that belief will be concrete and may bring him a slam or two. He probably has about 3 years of peak from now, so I hope he wins some in that time.
There's no point in hiding your head in the sand.
One might wonder why Zverev only burst into tears yesterday and not on the previous two occasions when he lost the other two slam finals.
Well the reason is very simple, because yesterday he finally understood that his chances of winning a slam have drastically reduced.
He understood firsthand how much of a gap there is between him and Sinner.
The problem is that between the two the younger one is Sinner.
Zverev has already reached his peak and now he can only maintain it at most, while Sinner can still have margins.
Then I agree that on clay the difference between the two is reduced compared to hard, but reducing it does not necessarily mean that it is reversed.
Apart from the fact that on clay the current reference player of the circuit on the surface also comes into play, which is Alcaraz, so double stumbling block for the German.
Last year Sinner, net of hip problems, already had a higher level than Zverev on clay.
Obviously in tennis there is no transitive property, the fact remains that both in Monte Carlo and in Paris, Sinner put the future winners of the respective tournaments (Tsitsipas and Alcaraz) in much more difficulty than Zverev did.
But above all the history between the two even in the period in which Sinner was not yet the player he is today, tells us that the Italian suffered the matchup with Zverev more on hard than on clay.
On clay against Zverev he boasts a clear victory at the Roland Garros autumn version 2020 (even if the German had the flu), but also a thrilling match lost by the Italian only in the tiebreak of the third decisive set in Monte Carlo 2022.
Sinner is too big an obstacle for Zverev, he knows it, Sinner knows it, I know it, you know it, and everyone knows it except those who try to convince themselves that it is not so.
And there was no need for yesterday's demolition which was a normal consequence of the current trend.