What should I do?? Why am I unhappy? Is it because I live here??

So basically, I live with my(20m) mom, sister27, brother,33, other brother18, and niece12 daughter of my sister. I’m always unhappy here. There’s codependency, interdependency, no communication, ZERO communication, no one talks abojt their feelings, when someone has done something wrong. I just feel so....weird here. I don’t fit in here. Like what’s wrong?!. Do I leave? I often have trouble deciding myself what’s going on, what’s bad, if I should leave or not. If I’d be happier if I left. If anyone can guide me through this, I’d be so happy. I can’t stand it anymore. My mental health/state is just going bananas cuz of all this. Idk if there’s something wrong with me or.... they all seem happy but idk. I’m not happy. I hate coming here, I don’t talk to anyone. They’re always busy going in circles because of constant tv watching or video gaming. Idk what’s going on, if it helps to mention, I work at McDonald’s and I get along just fine with everyone there, I talk, I’m happy. I’m starting to make friends there(as I just started working there abojt a month ago). I suggest family therapy and they constantly say IM the problem. when I’m NOT.