Several critics pointed out the 'flaws' in the book's plot.
Vanity was the one 'flaw' in his character.
There are a few 'flaws' in your argument.
(..) The Persian warrior elite. The deadliest fighting force in all of Asia: The Immortals. The god-king has betrayed a fatal flaw: Hubris. Easy to taunt, easy to trick. Before wounds and weariness have taken their toll... ...the mad king (..)2006 300
(..) I followed you. But now that you are standing here, I just realized... There's a bit of green in the blue of your eyes. How nice to find a flaw. You're Sokovian. Is that what this is about? Sokovia was a failed state long before you blew it to hell. No. (..)2016 Captain America: Civil War
(..) - to there. - And to here. So just don't bend over. We should be fine. Oops. - A design flaw. You're in that good light, that candle glow You look fantastic, so dynamo... Hey, Elliot, (..)2018 Fifty Shades Freed