Most geniuses didn’t have exceptional mentors. In fact, history shows us that the protégés of outliers rarely became outliers themselves.
Da Vinci ran a large workshop in Milan and trained dozens of apprentices, none of whom broke out. At Los Alamos, Feynman had formed his reputation before Oppenheimer caught him. Picasso drew a constant orbit of younger painters but none became major artists.
Students of giants tend to spend their careers producing passable imitations, while students of journeymen are statistically far more likely to overtake their teachers.
Protégés will spend a decade unconsciously optimising for a single person's approval, and by the time they realise this the imprint is permanent. They tend to inherit the bad habits but not the genius.
You will do better by finding a mentor that is 1-2 rungs above you, not 10 rungs above.