生於環境好一點的家庭就代表開心嗎？

好多人見到我就會覺得比起好多香港人，我好幸運，因為生於中等家庭。好多花費都不用擔心，可以外國留學。。。。。。。。
不過這樣會開心嗎？我覺得我壓力非常大。。。。。以下用英文解釋，比較容易描述。
I have a really intelligent brother....always top of his class, and super athletic.....
My mom has great expectations for him, like getting into Ivy League universities in the States....hopefully Harvard...
I on the other hand, is just a super normal average girl....slightly more athletic than other Asians, but academic wise, maybe......average or lower than average....My parents were just happy about the fact that I got into a university.....
Every time I go home, I feel really stressed. I am always compared with my LITTLE brother....notice how I emphasized the word "little". He can do calculus. He knows how to do differentiation and stuff...but he is only 13.
That's why I feel really stressful. A home is supposed to be a place where you can relax, lay back and do whatever you want...but every time I go home, I feel like someone cutting me open and putting a huge bad of rocks in me, like in the Little Red Riding Hood. I had a huge argument with my mom the other day, and she hasn't talked to me for three days now, and still is ignoring me.....My mom would never have such a huge argument with my brother......Both of my parents love him too much, they won't even bother to ask him to do some simple housework like taking out the trash.....I got really upset of course, and I couldn't hold it in anymore. I had a huge outburst. Right after my mom got mad, I left the house and went to school to study.....Did the same thing the second day, then went to my friend's house to celebrate a Chinese holiday, and did the same thing the day after. I always wonder, had I been born in another family, one not having university educated parents, would I be as stressful as I am now? Maybe they will take it easy on me? Or, if I am like my brother, they would treat me way better than they are treating me now......They don't even care about what I think....I HATE THEM.....I am just really unlucky....I need to regain my status in this household, that's why I always tell myself, I need to work harder and get a better job in the future. This is the only thing that can help me now...