First of all, there is no need for the drama. You are not the CAF and there is no need for you to get all personal about it. So just chill out there buddy, it's a forum of opinions!
Off the top of my head,
Ruben Neves
Youri Tielemans
Lewis Cook
Will Hughes
Julian Weigl
Oliver Torres
R. Bazoer
Sergi Samper
Dele Alli
Paul Pogba
Jorritt Hendrix
Adrien Rabiot
I beleieve you have made mention of some of these players as I have listed above, referencing where they were stats wise at the same age. I am glad
@Invictus answered well. I am not disputing that he will not be a good player but there is little evidence to support his hype. As a young player, it's not the level of the competition that you play in that really matters but the level of performance that you put in that matters. For example, Dele Alli may have played in the lower leagues but he was putting in performances way above the average league level. Tielemans started off at 16, in the Belgium league, but he put in performances that were just too good for a 21 year old.
All the players that I have mentioned put in performances at a much higher level than Sanchez currently does, despite being physically more underdeveloped than Sanchez. If Sanchez is as highly rated as you think, surely he should be playing at a higher level than these guys, regardless of what leagues they play.
Btw, the £60m being sounded about is his release clause, and that doesn't mean anything!