Complaining is another way of saying to others, YOU SOLVE THE PROBLEM.
We must be open to our mistakes and grow. Growth isn't based on being perfect, but moving toward the best we can be by being honest.
A persons outer action reflects their inner mind.
If we do not create inner peace, outer peace is not possible.
Find yourself. Be with yourself. Fail and then achieve.
The minute you say "I can't", it is another wrong affirmation to your subconscious that you choose to lose.