The fact that you don't like something doesn't mean it is not amazing.
The fact that you can't march a record doesn't mean it can't be beaten.
The fact that you gave up on a quest, doesn't prove that it can't be completed.
The fact that you fail to solve a problem, doesn't mean it has no solution.
That you didn't get something right doesn't mean everyone else will surely get it wrong.
As you already know, “one man's best effort could just be another man's worst try”. We all must admit that the world doesn't really revolve around or depend on anyone in particular (me or you). If you still doubt that; die! And see if the world ceases to exist without you.