Have you ever experienced, not being appreciated before?

You know in the situation where you give someone 100 % and in return they do not appreciate it one bit. Not saying that you should always expect something back in return for giving, but hey a little acknowledgement would be nice.
In Chinese there is a saying …….

Art by Yin Lau

“It’s like playing piano to a cow” ( “对牛弹琴” )

This saying perfectly describes and is a metaphor for a situation where someone is not being appreciative of your efforts. Finally, do you think this piece is nicely written?
Or is it like playing piano to a cow?