How will you get over yourself from such failure?

Your question is very specific. I can only think of general answers.

First, every human being is flawed. Even your greatest heroes aren’t perfect. We can all inspire one another without having to be superhuman ourselves.

Second, the thing to aspire to is your own best self and not an imitation of someone else.

Third, you’re not through yet.

Keep trying, you’ll get it.

Otherwise, not worth it anyway.

Be always happy and grateful with any action or consequence in your life? Don’t set standards, high, low, poor, rich, dumb, smart. Keep the mentality I just mentioned in consistency, and there would be no reason to ever be unhappy.

Don’t measure yourself against anyone else’s yardstick. As @Jeruba said, be your own best self.

Just be the best of your self.

Aspire to be the best you can be. You’ll have unique gifts to give the world, as we all do. Take the lessons, leave the negative feelings and start again. When things don’t work out the way we feel/wish they should, there’s always time for reflection and learning.
You should try to tap into your own talents and brilliance and work towards developing that.

I think of the quote from Thomas Edison, “I haven’t failed. I found 10,000 ways that didn’t work.”

A mistake is only failure if your don’t correct the mistake. If you do, it’s a “learning opportunity.” You learn a whole lot more about a lot of things by going back, figuring out where things went wrong, and fixing it. Sometimes you still don’t get but you learn something along the way.

If you’re talking about being a failure because you don’t live up to your parent’s expectations, you have to take a long, hard look and ask yourself if you are living up to your own expectations for yourself. Don’t settle for being less than your own best self. Celebrate your strengths as a person. Like @Jeruba said, be your own best self.

I spent some years in trying on other people’s personalities because I couldn’t see mine clearly. A waste of time, it turns out. We are all works-in-progress, although I see admirable traits in others that I try to encorporate into my self.

@Jeruba : I Agree with you!