The only advice I can give you is that you have to change your life for YOU. You can't expect that your family will necessarily give you the feedback you want.
Let me give you an example. My parents were wonderful people. But they carried with them a big prejudice against fat people. At the same time, they had lived through very hard times in Germany, when they almost starved. As a result, I was a Platinum Member of the "Clean Your Plate Club." Also, it was almost rude not to accept seconds. As a result, I became overweight before I was a teenager. I was skinny in high school, but then I started to gain weight after I dropped out of college.
So every time I visited my parents, I knew that on the one hand, I was fat, and on the other hand, they disliked fat people intensely. I kept trying to lose weight to please THEM, and it didn't work.
I used to dread the Christmas holiday, because that's when I would go to see my parents and hear all the comments about my weight. Then, one year I actually lost 60 lbs. But that year they didn't say a thing about the weight I lost -- not one word!
Now, in my late 50's, my father is dead and my mom has dementia, so she doesn't know if I'm fat or not, or if I lost weight or not. Finally, I am doing this for MYSELF (sounds pathetic, I know, but it's true).
Yes, it's disappointing if your family doesn't recognize your efforts, but that's the way life is. The best advice I can give you is to forget it, put it out of your mind, remind yourself that this is YOUR battle and YOUR victory. Get the support and approval from places like WLF, where you can talk to people who don't have such a subjective relationship with you.
I don't know if this helps you or not, but you're certainly not alone in your frustration.