My families and their cold asses

Two more days with my families since my flight to LA for my cousin's wedding. Just like anyone else, hanging around with your families after you have lived alone for awhile could be, how should I put this, very exhausting and frustrating. And today, I am officially in hell.
My families are well separated-canada, Taiwan, LA, Australia....we barely see each other. My cousin's wedding is a big gathering for all of us who can make it, but it turns out that, the longer you don't live or deal with each other, the more difficult it becomes to live with each other. Here are some quotes that offended me: you are not important; no one cares about you today; you look fat; don't give suggestions, what do you know; and when I pronounce something wrong, this is what i get "you call yourself a PhD?"....Lots of those are teases more than insults, but I just find them hard to take sometimes. And today, the war between my father and my uncle began. We went to Niagara falls, everything was nice and peachy until our way back. My uncle likes to say how good everything about him is, but he went too far by saying " how could you find places like this in taiwan?! In taiwan, everywhere is full of people and dogs...."; my father is really offended and wanted to drive back with me right away. I refused.
I dislike what my uncle said, yet I sort of understand where it comes from. I think, with a country you love that constantly disappoints you, the love becomes hate. And people need to find positive things about their choices and suroundings, otherwise you are easly depressed. The easiest way to do this is to put other things down. I can see lots of these in my families. My grandparents are living in LA for ~15 years. If they had stayed in TW the whole time, I couldn't imagine they would want to come here and stay here. But now, after 15 years, they would say something like" this and that here are even better than ini TW....", while they really are not better, at least in my oppinion.
I don't want them to fight, especially over such meaningless stuff. I told my dad I don't think uncle meant that way, but my dad said it is hurtfull. He is not a fan of lots of things about taiwan in general himself, and it's still hurtful. This identity thing is really something.
Other than all those stuff, the wedding and the falls are great!