Hi this is a reminder that this character ended up turning into a goddess (literally) and saving billions of lives. Her kindness and compassion as well as her selflessness changed the world despite her doubting herself and loathing herself.
This is also a reminder that you, are a Madoka. Sure you cannot turn into a goddess and save and rewrite the universe, but you can guide your life into being who you want to be through hardwork and effort. And that how much you will ever doubt yourself is a lie because you have something special just like Madoka did.
You may see yourself a dumb, clumsy and no special traits to speak of, but you can change that through effort. The people around you may see differently. Remember that you are as blank of a slate as everyone else and only you can truly take your life into your hands and change it, no matter the environment.
