"Once you've accepted your flaws, NO ONE can use them against you." It's one of the hardest and most liberating things at the same time, to accept your flaws.and more so, to shine a new, bright light on these flaws.
Trying to fill in someone else's shoes is futile. The person will at best be a shadow of the one who shoes they are trying to fill. It is best to have new shoes (their own) rather than live in the shadow of another