You don't see things as they are. You see things as you are.
Don't focus on trying to be 'the best'. Focus on being irreplaceable.
Be proud of yourself for how far you have come, and never stop pushing to be the best you can be.
If you can't see the assets in you, it will be hard for you to export it to the world. Recognise who you are and the world will recognise you.
Don't be afraid to raise your standards. You'd actually be surprised to know that there's someone out there more than willing to meet them.