Want to move forward in your design career? Get used to failing.
Yes, the design might be a flop if you hit publish. You might not get the job if you apply for it.
However, the only way to guarantee never failing is to never even try.
As I taught my son to ride his bike this past summer he told me in a worried tone “but I might fall”! I responded “well… actually, you will fall”. It is not a possibility, it is a guarantee.
The only way to never fall off of a bike is to not ride on one.
The only way to never fail in design would be to never post, publish, submit, pitch or share anything.
Nobody can have a successful career in design without some failure along the way.