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 you're happy, you enjoy the music but when you're sad, you understand the lyrics." - Music quote by Frank Ocean Isn't that the truth. I really understand the lyrics, and it's not getting any easier with time.