career path - If you know a family member who is much more qualified and capable in mathematics than you are, should find another field of specialisation?

Imposter Syndrome and depression: I feel pretty depressed that I am not as "qualified" as a close family member. In particular, this family member has undergraduate and graduate (PhD) degrees from Ivy League schools in mathematics. Whenever I try to solve a problem, this family member does it in half the time. Does this mean that I should try and find another field to specialize in?