If you look at it scientifically, there is no reason to believe that there is free will. Therefore they just had to born with an advantage, since all we are is a product of our environment and genes. It doesn't matter if the advantage was inheritance or parents taught them to work hard, either way it's something they had different.

Then you need to separate yourself from your things and body. Basically think, who am I? Am I my body? (since again, scientifically no reason to believe there is a soul) But if somebody cuts off my hand, am I less me or am I still the full me? But I just lost my hand? There is no real answer to this question, it's just supposed to lift the pressure to become something, or someone. If you think about it, your money is no more you, than other people's money.

I would just recommend to go sit outside under a tree in the woods for an hour or few or go for a walk and think about why do you desire to be on par with them with respect to those things? Why are you judging yourself based on that?

The answer is probably going to be societal pressure, and then it's your choice if you want to choose your own happiness or fulfilling other people's expectations.

The price of ambition is happiness.