Your feelings are valid. I felt this way at times. Not a good feeling at all.

I have a friend who is unmarried with no children and she is often treated certain way in a family. She is asked to babysit her niece all the time (unreasonable amount) and she is asked to drive grandma everywhere and she is asked to clean and cook for events etc pretty much her life revolves around her family but at the end she isn’t acknowledged as much and doesn’t get as much appreciation as her siblings.

Pretty much the message is “you have nothing else to do but help us”. But the catch is one of her sister is also single but her parents don’t make her do 100 things and they appreciate her. My friend says it’s because her sister just wouldn’t take these tasks on. She’d just not be available as she has hundreds of her own things to do. So no one asks her.

My friend however not only can’t say NO but also actively tell people that she has no life so her family (especially her married brother) actually think (they said that too) that by enlisting her to do 100 things they do her a favor by keeping her busy so she isn’t lonely.

Your parents might not appreciate all you do because they might think you have nothing else to do (of course you do but they might not grasp since you are available to do these things). Next time holidays roll in just not do all that. Be busy with other things. Just not be as available. I don’t mean you need to play games but if your parents don’t understand that they are hurting you, perhaps you can spend precious time doing other things.