Just because you aren't given the credit and haven't been recognised for your work doesn't mean you have to give up or stop. You don't always need credit, other people do not always have to know what you are capable of doing as long as you do.
When someone tells you it can't be done, it's more a reflection of their limitations, not yours. Huffington Post quote - Business /leadership ---- No limits on my boards! Come and pin as much as you can!