dont take it personal. They are being unsupportative. BUT I grew up with a dad who played piano. All freakin day.. then he would inlist my help to push the "record" button while he played. He would play the same song over, and over and over. It drove me NUTS!!! I was so sick of piano music.
My son's father plays bluegrass guitar. He comes home everyday, and starts playing around in the living room, where I am sitting after a long day, and I just want to quiety watch tv. Somehow he thinks it's fine for him to just fiddle around, practice whatever. Being Loud so I can't hear the TV. He takes offense and thinks I don't like his music because I want him to take it to the other room...
This is what happens with many musicans, and their family. You have to share the same audio space. and when you are practicing all the time, it gets old, as does anything. It's different for you because you are playing, making the choices, you are interacting and learning. To others, it's an unfinished song, that doesn't get resolved, the same song over and over..
I'm sorry that they are being so mean about it. I hope that they come to the events you play in and are listening then. You should try to work on them, on finding a spot in the house that is sound proof that you can go to. There are materials that you can buy and find that will help to create a space.. even your room? Remember just because they are not wanting to hear it, doesn't mean you are not good. or that they don't think your good. Maybe it's not their cup of tea, but if you are choosing the path of a musican, then this WILL be an issue for practice... don't they usually have practice halls too, where you can rent a room.. I think you should talk to it with your music teacher. This is a classic issue, he/she will know how to deal.