Knowing you are “bad” at something can be exactly what makes you good at it.

What makes you cautious? What makes you search for prior solutions to a problem from those who may have been smarter, worked harder, or thought longer about it than you? What makes you double check your work? What makes you measure twice to cut once? What makes you look before you leap? What makes you solicit feedback instead of banging your head against the wall, or failing with naive arrogance?

What makes you those things is not thinking your the best, not thinking your infallible, and it's what makes you great.