I can only speak from personal experience and I see some things that look akin to yours.
I've made those similar changes in healthy living, relationships, and even location, and other people don't. They are stuck in their bad habits and it must be where they want to be. Perhaps they don't know the minor changes that could make it better. Not my place to tell them anyway. I do feel like I'm bragging a little when I talk about making healthier choices but I'm really looking for, and not getting, some validation, if only a little "that's good" once. Nothing. I know I shouldn't have to want that, but I do anyway.
Any of this seems like your situation? I don't know how to fix it, but I know I shouldn't want that. Perhaps that's how to fix it, to let go of selling approval.