Do you suffer from not being brilliant or a genius, not achieving greatness?

I feel trapped in a mold of mediocrity. I’m a Jack of all trades and a master of none. I know a little about everything and a lot about nothing. Everything I accomplished or tried has generated adequate or just good outcomes. Nothing to me has ever been good enough. I’ve never been satisfied with any result. And I suffer for my weaknesses to excel to higher levels of success. And it’s painful and frustrating. I keep thinking, “What more do I have to do to get out of this rut”?

I struggle with everything I try. I’m generally moderately successful because of my one strength and that is bone head perseverance. I never give up no matter how massive, how futile and tedious the challenge. I succeed mostly through brute force.

Here’s a short clip from the 1984 movie “Amadeus”. I feel like I’m the reincarnation of Sigore Salieri.

https://www.youtube.com/watch?v=9jlQiHHMlkA&t=15s

I suppose it is true what they say, “You can’t put in what God has left out”.

How do you cope in the face of genus?
How do you accept that being mediocre is your best despite giving it your all?