What do you think Achebe meant when he said, "If you don't like someone's story, write your own"?

It means if there is something you can do to solve a problem, do it instead of complaining.

Explanation:

This quote is from Achebe's book "Things fall apart". It talks about how we are the only people who totally understand ourselves. We, as individuals, are the only people who know our story completely Every one else has seen just a figment of our personality, and just a few figments is not enough to tell our story. So, we need to step up and be the tellers of our own story. Do something about it.