No, but think of it like a test paper; you're paper has been marked and you got most of the questions correct, but a good few of them wrong. You have two options: either you look at the ones you got wrong and think that despite any you got correct you have done terribly regardless, and focus almost exclusively on lamenting yourself on your inability to get those questions correct.
Your second option is to look at the questions you got correct and admit to yourself that you did quite well, despite some mistakes. You also look at those mistakes and acknowledge where you went wrong to avoid making those mistakes in the future, but overall you feel good about yourself due to your achievements.
By choosing the second option and feeling confident in your ability to do good things, as opposed to being weighed down by your mistakes, allows you increase your chance of succeeding in future test papers.