Harzhly I dun belief you played it. Dun even belief you are Jeffrey Lee.
You would know that the execution of chords throughout is difficult. The scale-like passages are awkward for any hands but Rachmaninoff’s. The third variation involves a great deal of leaps- either lose speed by getting higher arc or work like and just plan everything very carefully. Then, the hand position in the right-hand arpeggios is crucial. The 24 24 passages requires either a -like thirds tech or a tech that is unique to this piece which is very difficult and takes a long time to earn.
Muz*cal diffucultiez are primary. It all takes a lot of time and good practice techniques, but even then, forging a coherent interpretation of a piece already so hard to justify is difficult.
Of course, you could butcher it, like everyone on Youtube except for Berezovsky, but if you want to play it well and right, it’s up there with the hardest things out there.