How should I handle my failure?

Firstly, accept it.
Accept that there is something still missing.
Accept that you could have done it better.
Accept there is a way to do it more better.
Just be faithful to yourself.
Be truthful to yourself.
It will help you improve.

"You're not a failure until you call yourself one."

You do it again!
You try it again!
You give more again!

I'm sure some of us knows who I
Thomas Edison is?

The man who tried a light bulb for 999 times.

Are you kidding!

That was a very long time.

Exactly!

That is how you need to try again.

That is how you need to give all you've got into it.

Don't go about crying when you fail.

Don't go about causing trouble, and be angry at everyone you see.

Remember,

"You're not a failure, until you decide to remain one."