You know what? We are Chinese, even we are abroad, got PR or citizenship or even married with people from other race, we still are and will be Chinese forever. You know what I mean? You can't change anything that is already there. So the best way is forget the unhappy and don't question your LG or your brother.
actually for this case, I think your LG is just fine. There are someone who have problems in sleep like you LP. He shouldn't be blamed by your brother. Next time your brother complain your LG, just ask your brother think about you and him and his wife live in a same room...
Get yourself back. Nothing worth you to be sad, even they are the person you're quite close to... Be happy and treat yourself well.