I am, what I am

I am what I am
No more, no less
I screw up, it's true
But I'm trying my best.

Don't hate me for failing
That's how I grow
But you did it already
Ages ago.

I can't be like you
If that's what you need
I'm an altogether
Different breed.

I am what I am
It's fun being this way
If you can't understand me
Then just GO AWAY!